56289708987 has 16 divisors (see below), whose sum is σ = 75793256448. Its totient is φ = 37156429440.

The previous prime is 56289708983. The next prime is 56289708989. The reversal of 56289708987 is 78980798265.

It is not a de Polignac number, because 56289708987 - 2² = 56289708983 is a prime.

It is a super-2 number, since 2×56289708987² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56289708983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3174787 + ... + 3192467.

It is an arithmetic number, because the mean of its divisors is an integer number (4737078528).

Almost surely, 2^56289708987 is an apocalyptic number.

56289708987 is a deficient number, since it is larger than the sum of its proper divisors (19503547461).

56289708987 is a wasteful number, since it uses less digits than its factorization.

56289708987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28090.

The product of its (nonzero) digits is 121927680, while the sum is 69.

The spelling of 56289708987 in words is "fifty-six billion, two hundred eighty-nine million, seven hundred eight thousand, nine hundred eighty-seven".