55771521200 has 60 divisors (see below), whose sum is σ = 134130006648. Its totient is φ = 22285478400.

The previous prime is 55771521191. The next prime is 55771521301. The reversal of 55771521200 is 212517755.

It is a super-2 number, since 2×55771521200² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316604 + ... + 460196.

Almost surely, 2^55771521200 is an apocalyptic number.

55771521200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55771521200 is an abundant number, since it is smaller than the sum of its proper divisors (78358485448).

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

55771521200 is a wasteful number, since it uses less digits than its factorization.

55771521200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144582 (or 144571 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 35.

The spelling of 55771521200 in words is "fifty-five billion, seven hundred seventy-one million, five hundred twenty-one thousand, two hundred".