56251613545 has 16 divisors (see below), whose sum is σ = 67967119440. Its totient is φ = 44692228864.

The previous prime is 56251613491. The next prime is 56251613563. The reversal of 56251613545 is 54531615265.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17380730896 + 38870882649 = 131836^2 + 197157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56251613545 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360399 + ... + 492331.

It is an arithmetic number, because the mean of its divisors is an integer number (4247944965).

Almost surely, 2^56251613545 is an apocalyptic number.

It is an amenable number.

56251613545 is a deficient number, since it is larger than the sum of its proper divisors (11715505895).

56251613545 is a wasteful number, since it uses less digits than its factorization.

56251613545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132524.

The product of its digits is 540000, while the sum is 43.

The spelling of 56251613545 in words is "fifty-six billion, two hundred fifty-one million, six hundred thirteen thousand, five hundred forty-five".