56771643 has 16 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 37286304.

The previous prime is 56771623. The next prime is 56771651. The reversal of 56771643 is 34617765.

It is not a de Polignac number, because 56771643 - 2⁹ = 56771131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56771623) 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, 82780 + ... + 83462.

It is an arithmetic number, because the mean of its divisors is an integer number (4801680).

Almost surely, 2^56771643 is an apocalyptic number.

56771643 is a deficient number, since it is larger than the sum of its proper divisors (20055237).

56771643 is a wasteful number, since it uses less digits than its factorization.

56771643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058.

The product of its digits is 105840, while the sum is 39.

The square root of 56771643 is about 7534.6959460883. The cubic root of 56771643 is about 384.3354883306.

The spelling of 56771643 in words is "fifty-six million, seven hundred seventy-one thousand, six hundred forty-three".