55188912123040 has 72 divisors (see below), whose sum is σ = 134725409591220. Its totient is φ = 21363449794560.

The previous prime is 55188912122941. The next prime is 55188912123049. The reversal of 55188912123040 is 4032121988155.

It can be written as a sum of positive squares in 2 ways, for example, as 55016457966864 + 172454156176 = 7417308^2 + 415276^2 .

It is not an unprimeable number, because it can be changed into a prime (55188912123049) 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, 179310705 + ... + 179618224.

Almost surely, 2^{55188912123040} is an apocalyptic number.

It is an amenable number.

55188912123040 is an abundant number, since it is smaller than the sum of its proper divisors (79536497468180).

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

55188912123040 is a wasteful number, since it uses less digits than its factorization.

55188912123040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358929006 (or 358928967 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 55188912123040 in words is "fifty-five trillion, one hundred eighty-eight billion, nine hundred twelve million, one hundred twenty-three thousand, forty".