56840282621 has 4 divisors (see below), whose sum is σ = 56888823744. Its totient is φ = 56791741500.

The previous prime is 56840282579. The next prime is 56840282627. The reversal of 56840282621 is 12628204865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12628204865 = 5 ⋅2525640973.

It is a cyclic number.

It is not a de Polignac number, because 56840282621 - 2²² = 56836088317 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 (56840282627) 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, 24268805 + ... + 24271146.

It is an arithmetic number, because the mean of its divisors is an integer number (14222205936).

Almost surely, 2^56840282621 is an apocalyptic number.

It is an amenable number.

56840282621 is a deficient number, since it is larger than the sum of its proper divisors (48541123).

56840282621 is a wasteful number, since it uses less digits than its factorization.

56840282621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48541122.

The product of its (nonzero) digits is 368640, while the sum is 44.

The spelling of 56840282621 in words is "fifty-six billion, eight hundred forty million, two hundred eighty-two thousand, six hundred twenty-one".