56645623 has 4 divisors (see below), whose sum is σ = 56661880. Its totient is φ = 56629368.

The previous prime is 56645621. The next prime is 56645651. The reversal of 56645623 is 32654665.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32654665 = 5 ⋅6530933.

It is a cyclic number.

It is not a de Polignac number, because 56645623 - 2¹ = 56645621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56645621) 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, 540 + ... + 10657.

It is an arithmetic number, because the mean of its divisors is an integer number (14165470).

Almost surely, 2^56645623 is an apocalyptic number.

56645623 is a deficient number, since it is larger than the sum of its proper divisors (16257).

56645623 is a wasteful number, since it uses less digits than its factorization.

56645623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16256.

The product of its digits is 129600, while the sum is 37.

The square root of 56645623 is about 7526.3286534671. The cubic root of 56645623 is about 384.0508988340.

The spelling of 56645623 in words is "fifty-six million, six hundred forty-five thousand, six hundred twenty-three".