55500555552500 has 30 divisors (see below), whose sum is σ = 121368614887674. Its totient is φ = 22200222220000.

The previous prime is 55500555552469. The next prime is 55500555552511. The reversal of 55500555552500 is 525555500555.

It can be written as a sum of positive squares in 5 ways, for example, as 16072353613156 + 39428201939344 = 4009034^2 + 6279188^2 .

It is a super-2 number, since 2×55500555552500² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11100108611 + ... + 11100113610.

Almost surely, 2^{55500555552500} is an apocalyptic number.

55500555552500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55500555552500 is an abundant number, since it is smaller than the sum of its proper divisors (65868059335174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55500555552500 is a wasteful number, since it uses less digits than its factorization.

55500555552500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22200222245 (or 22200222228 counting only the distinct ones).

The product of its (nonzero) digits is 3906250, while the sum is 47.

The spelling of 55500555552500 in words is "fifty-five trillion, five hundred billion, five hundred fifty-five million, five hundred fifty-two thousand, five hundred".