55121360601663 has 12 divisors (see below), whose sum is σ = 79640121883608. Its totient is φ = 36738168138000.

The previous prime is 55121360601641. The next prime is 55121360601701. The reversal of 55121360601663 is 36610606312155.

It is a happy number.

55121360601663 is a `hidden beast` number, since 5 + 5 + 1 + 2 + 1 + 36 + 0 + 601 + 6 + 6 + 3 = 666.

It is not a de Polignac number, because 55121360601663 - 2⁵ = 55121360601631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121360601623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 783762588 + ... + 783832913.

It is an arithmetic number, because the mean of its divisors is an integer number (6636676823634).

Almost surely, 2^{55121360601663} is an apocalyptic number.

55121360601663 is a deficient number, since it is larger than the sum of its proper divisors (24518761281945).

55121360601663 is a wasteful number, since it uses less digits than its factorization.

55121360601663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1567599414 (or 1567599411 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 55121360601663 in words is "fifty-five trillion, one hundred twenty-one billion, three hundred sixty million, six hundred one thousand, six hundred sixty-three".