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57987478975 = 5217831643869
BaseRepresentation
bin110110000000010100…
…101011010110111111
312112200020200010220111
4312000110223112333
51422224243311400
642350012530451
74121661303316
oct660024532677
9175606603814
1057987478975
1122657469248
12b2a3a80a27
13561181a94a
142b4149927d
151795c1a3ba
hexd8052b5bf

57987478975 has 24 divisors (see below), whose sum is σ = 77051474640. Its totient is φ = 43135096320.

The previous prime is 57987478897. The next prime is 57987478979.

57987478975 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 57987478975 - 235 = 23627740607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57987478979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 786660 + ... + 857209.

It is an arithmetic number, because the mean of its divisors is an integer number (3210478110).

Almost surely, 257987478975 is an apocalyptic number.

57987478975 is a deficient number, since it is larger than the sum of its proper divisors (19063995665).

57987478975 is a wasteful number, since it uses less digits than its factorization.

57987478975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643979 (or 1643974 counting only the distinct ones).

The product of its digits is 1244678400, while the sum is 76.

The spelling of 57987478975 in words is "fifty-seven billion, nine hundred eighty-seven million, four hundred seventy-eight thousand, nine hundred seventy-five".

Divisors: 1 5 17 25 83 85 415 425 1411 2075 7055 35275 1643869 8219345 27945773 41096725 136441127 139728865 682205635 698644325 2319499159 3411028175 11597495795 57987478975