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61005388842 = 2332938956187
BaseRepresentation
bin111000110100001101…
…000101110000101010
312211110120101211222000
4320310031011300222
51444414334420332
644005301111430
74256525151336
oct706415056052
9184416354860
1061005388842
1123965a51632
12b9a66b8576
1359a2b33128
142d4a2047c6
1518c0b4ab7c
hexe34345c2a

61005388842 has 32 divisors (see below), whose sum is σ = 140242276800. Its totient is φ = 19633917744.

The previous prime is 61005388783. The next prime is 61005388889. The reversal of 61005388842 is 24888350016.

61005388842 is a `hidden beast` number, since 6 + 100 + 538 + 8 + 8 + 4 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19476528 + ... + 19479659.

It is an arithmetic number, because the mean of its divisors is an integer number (4382571150).

Almost surely, 261005388842 is an apocalyptic number.

61005388842 is an abundant number, since it is smaller than the sum of its proper divisors (79236887958).

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

61005388842 is a wasteful number, since it uses less digits than its factorization.

61005388842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38956227 (or 38956221 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 61005388842 in words is "sixty-one billion, five million, three hundred eighty-eight thousand, eight hundred forty-two".

Divisors: 1 2 3 6 9 18 27 29 54 58 87 174 261 522 783 1566 38956187 77912374 116868561 233737122 350605683 701211366 1051817049 1129729423 2103634098 2259458846 3389188269 6778376538 10167564807 20335129614 30502694421 61005388842