56557147287 has 16 divisors (see below), whose sum is σ = 75852070112. Its totient is φ = 37483637760.

The previous prime is 56557147271. The next prime is 56557147301. The reversal of 56557147287 is 78274175565.

It is not a de Polignac number, because 56557147287 - 2⁴ = 56557147271 is a prime.

It is a super-2 number, since 2×56557147287² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56557147217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1730643 + ... + 1763019.

It is an arithmetic number, because the mean of its divisors is an integer number (4740754382).

Almost surely, 2^56557147287 is an apocalyptic number.

56557147287 is a deficient number, since it is larger than the sum of its proper divisors (19294922825).

56557147287 is a wasteful number, since it uses less digits than its factorization.

56557147287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35778.

The product of its digits is 16464000, while the sum is 57.

The spelling of 56557147287 in words is "fifty-six billion, five hundred fifty-seven million, one hundred forty-seven thousand, two hundred eighty-seven".