56765971947990 has 32 divisors (see below), whose sum is σ = 144252352245600. Its totient is φ = 14247145900544.

The previous prime is 56765971947943. The next prime is 56765971948009. The reversal of 56765971947990 is 9974917956765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55652913165 + ... + 55652914184.

It is an arithmetic number, because the mean of its divisors is an integer number (4507886007675).

Almost surely, 2^{56765971947990} is an apocalyptic number.

56765971947990 is an abundant number, since it is smaller than the sum of its proper divisors (87486380297610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56765971947990 is a wasteful number, since it uses less digits than its factorization.

56765971947990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111305827376.

The product of its (nonzero) digits is 8101522800, while the sum is 84.

The spelling of 56765971947990 in words is "fifty-six trillion, seven hundred sixty-five billion, nine hundred seventy-one million, nine hundred forty-seven thousand, nine hundred ninety".