55173021696 has 576 divisors, whose sum is σ = 183347531640. Its totient is φ = 16562257920.

The previous prime is 55173021649. The next prime is 55173021727. The reversal of 55173021696 is 69612037155.

55173021696 is a `hidden beast` number, since 5 + 517 + 30 + 2 + 16 + 96 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1345683436 + ... + 1345683476.

Almost surely, 2^55173021696 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 55173021696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91673765820).

55173021696 is an abundant number, since it is smaller than the sum of its proper divisors (128174509944).

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

55173021696 is an frugal number, since it uses more digits than its factorization.

55173021696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 55173021696 in words is "fifty-five billion, one hundred seventy-three million, twenty-one thousand, six hundred ninety-six".