56561207387 has 16 divisors (see below), whose sum is σ = 58611840000. Its totient is φ = 54525143520.

The previous prime is 56561207359. The next prime is 56561207393. The reversal of 56561207387 is 78370216565.

It is a cyclic number.

It is not a de Polignac number, because 56561207387 - 2¹⁰ = 56561206363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56561207317) 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 15 ways as a sum of consecutive naturals, for example, 9077189 + ... + 9083417.

It is an arithmetic number, because the mean of its divisors is an integer number (3663240000).

Almost surely, 2^56561207387 is an apocalyptic number.

56561207387 is a deficient number, since it is larger than the sum of its proper divisors (2050632613).

56561207387 is a wasteful number, since it uses less digits than its factorization.

56561207387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 56561207387 in words is "fifty-six billion, five hundred sixty-one million, two hundred seven thousand, three hundred eighty-seven".