56661590951 has 12 divisors (see below), whose sum is σ = 66565067400. Its totient is φ = 48086211600.

The previous prime is 56661590941. The next prime is 56661590963. The reversal of 56661590951 is 15909516665.

56661590951 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56661590951 - 2¹⁰ = 56661589927 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56661590893 and 56661590902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56661590941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5719601 + ... + 5729498.

It is an arithmetic number, because the mean of its divisors is an integer number (5547088950).

Almost surely, 2^56661590951 is an apocalyptic number.

56661590951 is a deficient number, since it is larger than the sum of its proper divisors (9903476449).

56661590951 is a wasteful number, since it uses less digits than its factorization.

56661590951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11449214 (or 11449207 counting only the distinct ones).

The product of its (nonzero) digits is 2187000, while the sum is 53.

The spelling of 56661590951 in words is "fifty-six billion, six hundred sixty-one million, five hundred ninety thousand, nine hundred fifty-one".