56121980695 has 16 divisors (see below), whose sum is σ = 73597934880. Its totient is φ = 40744230400.

The previous prime is 56121980671. The next prime is 56121980791. The reversal of 56121980695 is 59608912165.

It is a de Polignac number, because none of the positive numbers 2^k-56121980695 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 865366 + ... + 927955.

It is an arithmetic number, because the mean of its divisors is an integer number (4599870930).

Almost surely, 2^56121980695 is an apocalyptic number.

56121980695 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56121980695 is a deficient number, since it is larger than the sum of its proper divisors (17475954185).

56121980695 is a wasteful number, since it uses less digits than its factorization.

56121980695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793906.

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 56121980695 in words is "fifty-six billion, one hundred twenty-one million, nine hundred eighty thousand, six hundred ninety-five".