56818781 has 8 divisors (see below), whose sum is σ = 58406304. Its totient is φ = 55243440.

The previous prime is 56818669. The next prime is 56818787. The reversal of 56818781 is 18781865.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56818781 - 2²² = 52624477 is a prime.

It is a super-2 number, since 2×56818781² = 6456747748651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56818787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6851 + ... + 12671.

It is an arithmetic number, because the mean of its divisors is an integer number (7300788).

Almost surely, 2^56818781 is an apocalyptic number.

It is an amenable number.

56818781 is a deficient number, since it is larger than the sum of its proper divisors (1587523).

56818781 is a wasteful number, since it uses less digits than its factorization.

56818781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6091.

The product of its digits is 107520, while the sum is 44.

The square root of 56818781 is about 7537.8233595647. The cubic root of 56818781 is about 384.4418312947.

The spelling of 56818781 in words is "fifty-six million, eight hundred eighteen thousand, seven hundred eighty-one".