55621012655 has 8 divisors (see below), whose sum is σ = 71879462592. Its totient is φ = 41073978528.

The previous prime is 55621012591. The next prime is 55621012669.

55621012655 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55621012655 - 2⁶ = 55621012591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427853879 + ... + 427854008.

It is an arithmetic number, because the mean of its divisors is an integer number (8984932824).

Almost surely, 2^55621012655 is an apocalyptic number.

55621012655 is a deficient number, since it is larger than the sum of its proper divisors (16258449937).

55621012655 is a wasteful number, since it uses less digits than its factorization.

55621012655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855707905.

The product of its (nonzero) digits is 90000, while the sum is 38.

It can be divided in two parts, 556210 and 12655, that added together give a palindrome (568865).

The spelling of 55621012655 in words is "fifty-five billion, six hundred twenty-one million, twelve thousand, six hundred fifty-five".