56778533 has 8 divisors (see below), whose sum is σ = 66399168. Its totient is φ = 47535264.

The previous prime is 56778523. The next prime is 56778551. The reversal of 56778533 is 33587765.

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

It is a de Polignac number, because none of the positive numbers 2^k-56778533 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 (56778503) 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, 94016 + ... + 94617.

It is an arithmetic number, because the mean of its divisors is an integer number (8299896).

Almost surely, 2^56778533 is an apocalyptic number.

It is an amenable number.

56778533 is a deficient number, since it is larger than the sum of its proper divisors (9620635).

56778533 is a wasteful number, since it uses less digits than its factorization.

56778533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188683.

The product of its digits is 529200, while the sum is 44.

The square root of 56778533 is about 7535.1531504011. The cubic root of 56778533 is about 384.3510357898.

The spelling of 56778533 in words is "fifty-six million, seven hundred seventy-eight thousand, five hundred thirty-three".