55645432544 has 96 divisors (see below), whose sum is σ = 124533319680. Its totient is φ = 24263235072.

The previous prime is 55645432523. The next prime is 55645432573. The reversal of 55645432544 is 44523454655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2891177 + ... + 2910359.

It is an arithmetic number, because the mean of its divisors is an integer number (1297222080).

Almost surely, 2^55645432544 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 55645432544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62266659840).

55645432544 is an abundant number, since it is smaller than the sum of its proper divisors (68887887136).

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

55645432544 is a wasteful number, since it uses less digits than its factorization.

55645432544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19592 (or 19584 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 47.

The spelling of 55645432544 in words is "fifty-five billion, six hundred forty-five million, four hundred thirty-two thousand, five hundred forty-four".