56911225691 has 4 divisors (see below), whose sum is σ = 59385626832. Its totient is φ = 54436824552.

The previous prime is 56911225667. The next prime is 56911225717. The reversal of 56911225691 is 19652211965.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56911225691 - 2¹⁴ = 56911209307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56911222691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1237200536 + ... + 1237200581.

It is an arithmetic number, because the mean of its divisors is an integer number (14846406708).

Almost surely, 2^56911225691 is an apocalyptic number.

56911225691 is a deficient number, since it is larger than the sum of its proper divisors (2474401141).

56911225691 is a wasteful number, since it uses less digits than its factorization.

56911225691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474401140.

The product of its digits is 291600, while the sum is 47.

The spelling of 56911225691 in words is "fifty-six billion, nine hundred eleven million, two hundred twenty-five thousand, six hundred ninety-one".