56191130261 has 8 divisors (see below), whose sum is σ = 65584784640. Its totient is φ = 47139063408.

The previous prime is 56191130213. The next prime is 56191130269. The reversal of 56191130261 is 16203119165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56191130261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56191130269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85396526 + ... + 85397183.

It is an arithmetic number, because the mean of its divisors is an integer number (8198098080).

Almost surely, 2^56191130261 is an apocalyptic number.

It is an amenable number.

56191130261 is a deficient number, since it is larger than the sum of its proper divisors (9393654379).

56191130261 is a wasteful number, since it uses less digits than its factorization.

56191130261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170793763.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 56191130261 in words is "fifty-six billion, one hundred ninety-one million, one hundred thirty thousand, two hundred sixty-one".