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68881096844 = 22729471804871
BaseRepresentation
bin100000000100110100…
…0100010000010001100
320120210102221021021222
41000021220202002030
52112032030044334
651351000542512
74655636443220
oct1001150420214
9216712837258
1068881096844
112723764661a
1211424181a38
1366596a8891
143496196780
151bd2293d2e
hex1009a2208c

68881096844 has 48 divisors (see below), whose sum is σ = 145544878080. Its totient is φ = 27896070720.

The previous prime is 68881096829. The next prime is 68881096847. The reversal of 68881096844 is 44869018886.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (68881096847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864272 + ... + 940599.

It is an arithmetic number, because the mean of its divisors is an integer number (3032184960).

Almost surely, 268881096844 is an apocalyptic number.

It is an amenable number.

68881096844 is an abundant number, since it is smaller than the sum of its proper divisors (76663781236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68881096844 is a wasteful number, since it uses less digits than its factorization.

68881096844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804958 (or 1804956 counting only the distinct ones).

The product of its (nonzero) digits is 21233664, while the sum is 62.

The spelling of 68881096844 in words is "sixty-eight billion, eight hundred eighty-one million, ninety-six thousand, eight hundred forty-four".

Divisors: 1 2 4 7 14 28 29 47 58 94 116 188 203 329 406 658 812 1316 1363 2726 5452 9541 19082 38164 1804871 3609742 7219484 12634097 25268194 50536388 52341259 84828937 104682518 169657874 209365036 339315748 366388813 593802559 732777626 1187605118 1465555252 2375210236 2460039173 4920078346 9840156692 17220274211 34440548422 68881096844