56615729 has 8 divisors (see below), whose sum is σ = 60092928. Its totient is φ = 53154880.

The previous prime is 56615723. The next prime is 56615761. The reversal of 56615729 is 92751665.

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

It is a cyclic number.

It is not a de Polignac number, because 56615729 - 2⁸ = 56615473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56615723) 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, 3464 + ... + 11190.

It is an arithmetic number, because the mean of its divisors is an integer number (7511616).

Almost surely, 2^56615729 is an apocalyptic number.

It is an amenable number.

56615729 is a deficient number, since it is larger than the sum of its proper divisors (3477199).

56615729 is a wasteful number, since it uses less digits than its factorization.

56615729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175.

The product of its digits is 113400, while the sum is 41.

The square root of 56615729 is about 7524.3424297410. The cubic root of 56615729 is about 383.9833276362.

The spelling of 56615729 in words is "fifty-six million, six hundred fifteen thousand, seven hundred twenty-nine".