55072121490 has 48 divisors (see below), whose sum is σ = 150723705600. Its totient is φ = 13912956576.

The previous prime is 55072121477. The next prime is 55072121501. The reversal of 55072121490 is 9412127055.

55072121490 is a `hidden beast` number, since 5 + 507 + 2 + 1 + 2 + 149 + 0 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16101250 + ... + 16104669.

It is an arithmetic number, because the mean of its divisors is an integer number (3140077200).

Almost surely, 2^55072121490 is an apocalyptic number.

55072121490 is an abundant number, since it is smaller than the sum of its proper divisors (95651584110).

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

55072121490 is a wasteful number, since it uses less digits than its factorization.

55072121490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32205951 (or 32205948 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 55072121490 in words is "fifty-five billion, seventy-two million, one hundred twenty-one thousand, four hundred ninety".