55863630561 has 16 divisors (see below), whose sum is σ = 76545969408. Its totient is φ = 36213120000.

The previous prime is 55863630503. The next prime is 55863630593. The reversal of 55863630561 is 16503636855.

55863630561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55863630561 - 2²² = 55859436257 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55863630561.

It is not an unprimeable number, because it can be changed into a prime (55863635561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20536 + ... + 334886.

It is an arithmetic number, because the mean of its divisors is an integer number (4784123088).

Almost surely, 2^55863630561 is an apocalyptic number.

It is an amenable number.

55863630561 is a deficient number, since it is larger than the sum of its proper divisors (20682338847).

55863630561 is a wasteful number, since it uses less digits than its factorization.

55863630561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315992.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 55863630561 in words is "fifty-five billion, eight hundred sixty-three million, six hundred thirty thousand, five hundred sixty-one".