55620433402655 has 32 divisors (see below), whose sum is σ = 72973938235968. Its totient is φ = 40361380940800.

The previous prime is 55620433402637. The next prime is 55620433402717.

It is a happy number.

55620433402655 is nontrivially palindromic in base 10.

55620433402655 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 55620433402655 - 2³⁰ = 55619359660831 is a prime.

It is a super-2 number, since 2×55620433402655² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 621989507 + ... + 622078923.

It is an arithmetic number, because the mean of its divisors is an integer number (2280435569874).

Almost surely, 2^{55620433402655} is an apocalyptic number.

55620433402655 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55620433402655 is a deficient number, since it is larger than the sum of its proper divisors (17353504833313).

55620433402655 is a wasteful number, since it uses less digits than its factorization.

55620433402655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114427.

The product of its (nonzero) digits is 12960000, while the sum is 50.

It can be divided in two parts, 5562043 and 3402655, that added together give a palindrome (8964698).

The spelling of 55620433402655 in words is "fifty-five trillion, six hundred twenty billion, four hundred thirty-three million, four hundred two thousand, six hundred fifty-five".