56011005611 has 4 divisors (see below), whose sum is σ = 61102915224. Its totient is φ = 50919096000.

The previous prime is 56011005593. The next prime is 56011005637. The reversal of 56011005611 is 11650011065.

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 56011005611 - 2¹⁴ = 56010989227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56011005641) 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, 2545954790 + ... + 2545954811.

It is an arithmetic number, because the mean of its divisors is an integer number (15275728806).

Almost surely, 2^56011005611 is an apocalyptic number.

56011005611 is a deficient number, since it is larger than the sum of its proper divisors (5091909613).

56011005611 is a wasteful number, since it uses less digits than its factorization.

56011005611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091909612.

The product of its (nonzero) digits is 900, while the sum is 26.

Adding to 56011005611 its reverse (11650011065), we get a palindrome (67661016676).

The spelling of 56011005611 in words is "fifty-six billion, eleven million, five thousand, six hundred eleven".