56501729887 has 8 divisors (see below), whose sum is σ = 57488307120. Its totient is φ = 55517098560.

The previous prime is 56501729881. The next prime is 56501729899. The reversal of 56501729887 is 78892710565.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56501729887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56501729881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427837 + ... + 544102.

It is an arithmetic number, because the mean of its divisors is an integer number (7186038390).

Almost surely, 2^56501729887 is an apocalyptic number.

56501729887 is a deficient number, since it is larger than the sum of its proper divisors (986577233).

56501729887 is an equidigital number, since it uses as much as digits as its factorization.

56501729887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972953.

The product of its (nonzero) digits is 8467200, while the sum is 58.

The spelling of 56501729887 in words is "fifty-six billion, five hundred one million, seven hundred twenty-nine thousand, eight hundred eighty-seven".