56778071 has 16 divisors (see below), whose sum is σ = 66900288. Its totient is φ = 47174400.

The previous prime is 56778067. The next prime is 56778101. The reversal of 56778071 is 17087765.

56778071 = 294² + 295² + ... + 580².

It is not a de Polignac number, because 56778071 - 2² = 56778067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56778671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51401 + ... + 52493.

It is an arithmetic number, because the mean of its divisors is an integer number (4181268).

Almost surely, 2^56778071 is an apocalyptic number.

56778071 is a deficient number, since it is larger than the sum of its proper divisors (10122217).

56778071 is a wasteful number, since it uses less digits than its factorization.

56778071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 56778071 is about 7535.1224940276. The cubic root of 56778071 is about 384.3499933144.

56778071 divided by its sum of digits (41) gives a palindrome (1384831).

The spelling of 56778071 in words is "fifty-six million, seven hundred seventy-eight thousand, seventy-one".