56554640387 has 16 divisors (see below), whose sum is σ = 66626012160. Its totient is φ = 47000583168.

The previous prime is 56554640371. The next prime is 56554640413. The reversal of 56554640387 is 78304645565.

It is a happy number.

It is not a de Polignac number, because 56554640387 - 2⁴ = 56554640371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56554640327) 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, 768062 + ... + 838467.

It is an arithmetic number, because the mean of its divisors is an integer number (4164125760).

Almost surely, 2^56554640387 is an apocalyptic number.

56554640387 is a deficient number, since it is larger than the sum of its proper divisors (10071371773).

56554640387 is a wasteful number, since it uses less digits than its factorization.

56554640387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606690.

The product of its (nonzero) digits is 12096000, while the sum is 53.

The spelling of 56554640387 in words is "fifty-six billion, five hundred fifty-four million, six hundred forty thousand, three hundred eighty-seven".