65553172992 has 160 divisors (see below), whose sum is σ = 196440879360. Its totient is φ = 21850684416.

The previous prime is 65553172963. The next prime is 65553173083. The reversal of 65553172992 is 29927135556.

65553172992 is a `hidden beast` number, since 65 + 553 + 1 + 7 + 29 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 1090473 + ... + 1149015.

It is an arithmetic number, because the mean of its divisors is an integer number (1227755496).

Almost surely, 2^65553172992 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 65553172992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98220439680).

65553172992 is an abundant number, since it is smaller than the sum of its proper divisors (130887706368).

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

65553172992 is an frugal number, since it uses more digits than its factorization.

65553172992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58582 (or 58548 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 54.

The spelling of 65553172992 in words is "sixty-five billion, five hundred fifty-three million, one hundred seventy-two thousand, nine hundred ninety-two".