57261512690 has 16 divisors (see below), whose sum is σ = 103400027928. Its totient is φ = 22831426176.

The previous prime is 57261512689. The next prime is 57261512801. The reversal of 57261512690 is 9621516275.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25681024009 + 31580488681 = 160253^2 + 177709^2 .

It is a super-2 number, since 2×57261512690² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9144077 + ... + 9150336.

Almost surely, 2^57261512690 is an apocalyptic number.

57261512690 is a deficient number, since it is larger than the sum of its proper divisors (46138515238).

57261512690 is a wasteful number, since it uses less digits than its factorization.

57261512690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18294733.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 57261512690 in words is "fifty-seven billion, two hundred sixty-one million, five hundred twelve thousand, six hundred ninety".