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57871993934 = 2311618357679
BaseRepresentation
bin110101111001011100…
…001000110001001110
312112101012100220012202
4311321130020301032
51422010212301214
642330325401502
74116056555246
oct657134106116
9175335326182
1057871993934
11225a8260667
12b271269292
1355c3914ac1
142b2ddd6b26
15178aa076de
hexd79708c4e

57871993934 has 16 divisors (see below), whose sum is σ = 89615339520. Its totient is φ = 28000361880.

The previous prime is 57871993931. The next prime is 57871993969. The reversal of 57871993934 is 43939917875.

57871993934 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57871993931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 974507 + ... + 1032185.

It is an arithmetic number, because the mean of its divisors is an integer number (5600958720).

Almost surely, 257871993934 is an apocalyptic number.

57871993934 is a deficient number, since it is larger than the sum of its proper divisors (31743345586).

57871993934 is a wasteful number, since it uses less digits than its factorization.

57871993934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73895.

The product of its digits is 51438240, while the sum is 65.

The spelling of 57871993934 in words is "fifty-seven billion, eight hundred seventy-one million, nine hundred ninety-three thousand, nine hundred thirty-four".

Divisors: 1 2 31 62 16183 32366 57679 115358 501673 1003346 1788049 3576098 933419257 1866838514 28935996967 57871993934