55172372544 has 63 divisors (see below), whose sum is σ = 158157804207. Its totient is φ = 18388911744.

The previous prime is 55172372537. The next prime is 55172372579. The reversal of 55172372544 is 44527327155.

The square root of 55172372544 is 234888.

It is a perfect power (a square), and thus also a powerful number.

55172372544 is a `hidden beast` number, since 5 + 5 + 1 + 72 + 37 + 2 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 55172372544.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5632419 + ... + 5642205.

Almost surely, 2^55172372544 is an apocalyptic number.

55172372544 is the 234888-th square number.

It is an amenable number.

55172372544 is an abundant number, since it is smaller than the sum of its proper divisors (102985431663).

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

55172372544 is an frugal number, since it uses more digits than its factorization.

55172372544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19592 (or 9792 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

Adding to 55172372544 its reverse (44527327155), we get a palindrome (99699699699).

It can be divided in two parts, 55172 and 372544, that added together give a square (427716 = 654²).

The spelling of 55172372544 in words is "fifty-five billion, one hundred seventy-two million, three hundred seventy-two thousand, five hundred forty-four".