55621630563 has 4 divisors (see below), whose sum is σ = 74162174088. Its totient is φ = 37081087040.

The previous prime is 55621630553. The next prime is 55621630573. The reversal of 55621630563 is 36503612655.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55621630553) and next prime (55621630573).

It is a cyclic number.

It is not a de Polignac number, because 55621630563 - 2¹⁴ = 55621614179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55621630553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9270271758 + ... + 9270271763.

It is an arithmetic number, because the mean of its divisors is an integer number (18540543522).

Almost surely, 2^55621630563 is an apocalyptic number.

55621630563 is a deficient number, since it is larger than the sum of its proper divisors (18540543525).

55621630563 is a wasteful number, since it uses less digits than its factorization.

55621630563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18540543524.

The product of its (nonzero) digits is 486000, while the sum is 42.

The spelling of 55621630563 in words is "fifty-five billion, six hundred twenty-one million, six hundred thirty thousand, five hundred sixty-three".