55345520988 has 18 divisors (see below), whose sum is σ = 139901178144. Its totient is φ = 18448506984.

The previous prime is 55345520987. The next prime is 55345521001. The reversal of 55345520988 is 88902554355.

It is a happy number.

55345520988 is a `hidden beast` number, since 5 + 5 + 3 + 4 + 552 + 0 + 9 + 88 = 666.

55345520988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×55345520988² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55345520981) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 768687756 + ... + 768687827.

Almost surely, 2^55345520988 is an apocalyptic number.

It is an amenable number.

55345520988 is an abundant number, since it is smaller than the sum of its proper divisors (84555657156).

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

55345520988 is a wasteful number, since it uses less digits than its factorization.

55345520988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537375593 (or 1537375588 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 54.

The spelling of 55345520988 in words is "fifty-five billion, three hundred forty-five million, five hundred twenty thousand, nine hundred eighty-eight".