56561660782 has 24 divisors (see below), whose sum is σ = 95531191056. Its totient is φ = 25082772000.

The previous prime is 56561660767. The next prime is 56561660807. The reversal of 56561660782 is 28706616565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2840394 + ... + 2860237.

It is an arithmetic number, because the mean of its divisors is an integer number (3980466294).

Almost surely, 2^56561660782 is an apocalyptic number.

56561660782 is a deficient number, since it is larger than the sum of its proper divisors (38969530274).

56561660782 is a wasteful number, since it uses less digits than its factorization.

56561660782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5700696 (or 5700685 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 56561660782 in words is "fifty-six billion, five hundred sixty-one million, six hundred sixty thousand, seven hundred eighty-two".