55642624655 has 48 divisors (see below), whose sum is σ = 70785960960. Its totient is φ = 41976216576.

The previous prime is 55642624651. The next prime is 55642624699.

55642624655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55642624655 - 2² = 55642624651 is a prime.

It is a super-2 number, since 2×55642624655² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55642624651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33458354 + ... + 33460016.

It is an arithmetic number, because the mean of its divisors is an integer number (1474707520).

Almost surely, 2^55642624655 is an apocalyptic number.

55642624655 is a deficient number, since it is larger than the sum of its proper divisors (15143336305).

55642624655 is a wasteful number, since it uses less digits than its factorization.

55642624655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908 (or 1879 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 50.

The spelling of 55642624655 in words is "fifty-five billion, six hundred forty-two million, six hundred twenty-four thousand, six hundred fifty-five".