56548751987 has 24 divisors (see below), whose sum is σ = 71051774976. Its totient is φ = 44608935168.

The previous prime is 56548751971. The next prime is 56548751989. The reversal of 56548751987 is 78915784565.

It is not a de Polignac number, because 56548751987 - 2⁴ = 56548751971 is a prime.

It is a super-2 number, since 2×56548751987² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56548751989) 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 23 ways as a sum of consecutive naturals, for example, 82958 + ... + 346380.

It is an arithmetic number, because the mean of its divisors is an integer number (2960490624).

Almost surely, 2^56548751987 is an apocalyptic number.

56548751987 is a deficient number, since it is larger than the sum of its proper divisors (14503022989).

56548751987 is a wasteful number, since it uses less digits than its factorization.

56548751987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263787 (or 263780 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 65.

The spelling of 56548751987 in words is "fifty-six billion, five hundred forty-eight million, seven hundred fifty-one thousand, nine hundred eighty-seven".