56620332647 has 4 divisors (see below), whose sum is σ = 56622018960. Its totient is φ = 56618646336.

The previous prime is 56620332631. The next prime is 56620332667. The reversal of 56620332647 is 74623302665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74623302665 = 5 ⋅14924660533.

It is a cyclic number.

It is not a de Polignac number, because 56620332647 - 2⁴ = 56620332631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56620332598 and 56620332607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56620332667) 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, 791747 + ... + 860292.

It is an arithmetic number, because the mean of its divisors is an integer number (14155504740).

Almost surely, 2^56620332647 is an apocalyptic number.

56620332647 is a deficient number, since it is larger than the sum of its proper divisors (1686313).

56620332647 is a wasteful number, since it uses less digits than its factorization.

56620332647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686312.

The product of its (nonzero) digits is 1088640, while the sum is 44.

The spelling of 56620332647 in words is "fifty-six billion, six hundred twenty million, three hundred thirty-two thousand, six hundred forty-seven".