55180972800 has 648 divisors, whose sum is σ = 203547472128. Its totient is φ = 14257152000.

The previous prime is 55180972747. The next prime is 55180972807. The reversal of 55180972800 is 827908155.

It is a happy number.

55180972800 is a `hidden beast` number, since 551 + 8 + 0 + 97 + 2 + 8 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (55180972807) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 421228735 + ... + 421228865.

Almost surely, 2^55180972800 is an apocalyptic number.

55180972800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55180972800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101773736064).

55180972800 is an abundant number, since it is smaller than the sum of its proper divisors (148366499328).

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

55180972800 is a wasteful number, since it uses less digits than its factorization.

55180972800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 55180972800 in words is "fifty-five billion, one hundred eighty million, nine hundred seventy-two thousand, eight hundred".