56515001901 has 32 divisors (see below), whose sum is σ = 79283318400. Its totient is φ = 35756878080.

The previous prime is 56515001899. The next prime is 56515001927. The reversal of 56515001901 is 10910051565.

It is not a de Polignac number, because 56515001901 - 2¹ = 56515001899 is a prime.

It is a super-2 number, since 2×56515001901² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515001971) 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 31 ways as a sum of consecutive naturals, for example, 10977610 + ... + 10982756.

It is an arithmetic number, because the mean of its divisors is an integer number (2477603700).

Almost surely, 2^56515001901 is an apocalyptic number.

It is an amenable number.

56515001901 is a deficient number, since it is larger than the sum of its proper divisors (22768316499).

56515001901 is a wasteful number, since it uses less digits than its factorization.

56515001901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7309.

The product of its (nonzero) digits is 6750, while the sum is 33.

The spelling of 56515001901 in words is "fifty-six billion, five hundred fifteen million, one thousand, nine hundred one".