56621069847 has 16 divisors (see below), whose sum is σ = 85064520960. Its totient is φ = 37215725400.

The previous prime is 56621069831. The next prime is 56621069851. The reversal of 56621069847 is 74896012665.

56621069847 is a `hidden beast` number, since 5 + 6 + 621 + 0 + 6 + 9 + 8 + 4 + 7 = 666.

It is not a de Polignac number, because 56621069847 - 2⁴ = 56621069831 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 56621069793 and 56621069802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56621079847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14766229 + ... + 14770062.

It is an arithmetic number, because the mean of its divisors is an integer number (5316532560).

Almost surely, 2^56621069847 is an apocalyptic number.

56621069847 is a deficient number, since it is larger than the sum of its proper divisors (28443451113).

56621069847 is a wasteful number, since it uses less digits than its factorization.

56621069847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29536371 (or 29536365 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 56621069847 in words is "fifty-six billion, six hundred twenty-one million, sixty-nine thousand, eight hundred forty-seven".