56701511111 has 4 divisors (see below), whose sum is σ = 64801726992. Its totient is φ = 48601295232.

The previous prime is 56701511107. The next prime is 56701511123. The reversal of 56701511111 is 11111510765.

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

It is not a de Polignac number, because 56701511111 - 2² = 56701511107 is a prime.

It is a super-2 number, since 2×56701511111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56701511011) 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, 4050107930 + ... + 4050107943.

It is an arithmetic number, because the mean of its divisors is an integer number (16200431748).

Almost surely, 2^56701511111 is an apocalyptic number.

56701511111 is a deficient number, since it is larger than the sum of its proper divisors (8100215881).

56701511111 is an equidigital number, since it uses as much as digits as its factorization.

56701511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100215880.

The product of its (nonzero) digits is 1050, while the sum is 29.

The spelling of 56701511111 in words is "fifty-six billion, seven hundred one million, five hundred eleven thousand, one hundred eleven".