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68184184400 = 2452170460461
BaseRepresentation
bin111111100000000110…
…000001011001010000
320111222212120110010222
4333200012001121100
52104120122400100
651153503412212
74632445001423
oct774006013120
9214885513128
1068184184400
1126a0a215a22
121126a8b4068
1365781aa957
14342b7c39ba
151b90ed1485
hexfe0181650

68184184400 has 30 divisors (see below), whose sum is σ = 163812503982. Its totient is φ = 27273673600.

The previous prime is 68184184399. The next prime is 68184184423. The reversal of 68184184400 is 448148186.

It can be written as a sum of positive squares in 3 ways, for example, as 13283945536 + 54900238864 = 115256^2 + 234308^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 85229831 + ... + 85230630.

Almost surely, 268184184400 is an apocalyptic number.

It is an amenable number.

68184184400 is an abundant number, since it is smaller than the sum of its proper divisors (95628319582).

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

68184184400 is a wasteful number, since it uses less digits than its factorization.

68184184400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170460479 (or 170460468 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 44.

The spelling of 68184184400 in words is "sixty-eight billion, one hundred eighty-four million, one hundred eighty-four thousand, four hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 170460461 340920922 681841844 852302305 1363683688 1704604610 2727367376 3409209220 4261511525 6818418440 8523023050 13636836880 17046046100 34092092200 68184184400