55163731392 has 672 divisors, whose sum is σ = 217872405504. Its totient is φ = 12895027200.

The previous prime is 55163731387. The next prime is 55163731393. The reversal of 55163731392 is 29313736155.

55163731392 is a `hidden beast` number, since 5 + 5 + 1 + 637 + 3 + 1 + 3 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×55163731392² (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 (55163731393) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17340042 + ... + 17343222.

Almost surely, 2^55163731392 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 55163731392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108936202752).

55163731392 is an abundant number, since it is smaller than the sum of its proper divisors (162708674112).

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

55163731392 is a wasteful number, since it uses less digits than its factorization.

55163731392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3257 (or 3244 counting only the distinct ones).

The product of its digits is 510300, while the sum is 45.

The spelling of 55163731392 in words is "fifty-five billion, one hundred sixty-three million, seven hundred thirty-one thousand, three hundred ninety-two".