55122506488 has 128 divisors (see below), whose sum is σ = 127143360000. Its totient is φ = 22333086720.

The previous prime is 55122506479. The next prime is 55122506533. The reversal of 55122506488 is 88460522155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35086743 + ... + 35088313.

It is an arithmetic number, because the mean of its divisors is an integer number (993307500).

Almost surely, 2^55122506488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55122506488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63571680000).

55122506488 is an abundant number, since it is smaller than the sum of its proper divisors (72020853512).

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

55122506488 is a wasteful number, since it uses less digits than its factorization.

55122506488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290 (or 2272 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 46.

The spelling of 55122506488 in words is "fifty-five billion, one hundred twenty-two million, five hundred six thousand, four hundred eighty-eight".