56117789 has 24 divisors (see below), whose sum is σ = 72231768. Its totient is φ = 43182720.

The previous prime is 56117779. The next prime is 56117797. The reversal of 56117789 is 98771165.

It can be written as a sum of positive squares in 4 ways, for example, as 122500 + 55995289 = 350^2 + 7483^2 .

It is a de Polignac number, because none of the positive numbers 2^k-56117789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56117779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22379 + ... + 24759.

It is an arithmetic number, because the mean of its divisors is an integer number (3009657).

Almost surely, 2^56117789 is an apocalyptic number.

It is an amenable number.

56117789 is a deficient number, since it is larger than the sum of its proper divisors (16113979).

56117789 is a wasteful number, since it uses less digits than its factorization.

56117789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445 (or 2438 counting only the distinct ones).

The product of its digits is 105840, while the sum is 44.

The square root of 56117789 is about 7491.1807480530. The cubic root of 56117789 is about 382.8542894787.

The spelling of 56117789 in words is "fifty-six million, one hundred seventeen thousand, seven hundred eighty-nine".