56628768031 has 16 divisors (see below), whose sum is σ = 64860935040. Its totient is φ = 48963610080.

The previous prime is 56628768019. The next prime is 56628768037. The reversal of 56628768031 is 13086782665.

It is not a de Polignac number, because 56628768031 - 2¹⁵ = 56628735263 is a prime.

It is a super-2 number, since 2×56628768031² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56628768031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56628768037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303401 + ... + 1346146.

It is an arithmetic number, because the mean of its divisors is an integer number (4053808440).

Almost surely, 2^56628768031 is an apocalyptic number.

56628768031 is a deficient number, since it is larger than the sum of its proper divisors (8232167009).

56628768031 is a wasteful number, since it uses less digits than its factorization.

56628768031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649654.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 56628768031 in words is "fifty-six billion, six hundred twenty-eight million, seven hundred sixty-eight thousand, thirty-one".