56767791 has 8 divisors (see below), whose sum is σ = 76005424. Its totient is φ = 37687680.

The previous prime is 56767787. The next prime is 56767807. The reversal of 56767791 is 19776765.

It is a happy number.

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

It is not a de Polignac number, because 56767791 - 2² = 56767787 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56767791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56767721) 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, 38536 + ... + 39981.

It is an arithmetic number, because the mean of its divisors is an integer number (9500678).

Almost surely, 2^56767791 is an apocalyptic number.

56767791 is a deficient number, since it is larger than the sum of its proper divisors (19237633).

56767791 is a wasteful number, since it uses less digits than its factorization.

56767791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78761.

The product of its digits is 555660, while the sum is 48.

The square root of 56767791 is about 7534.4403242709. The cubic root of 56767791 is about 384.3267956471.

The spelling of 56767791 in words is "fifty-six million, seven hundred sixty-seven thousand, seven hundred ninety-one".