55720197120 has 528 divisors, whose sum is σ = 209652560928. Its totient is φ = 12592742400.

The previous prime is 55720197097. The next prime is 55720197149. The reversal of 55720197120 is 2179102755.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76016274 + ... + 76017006.

Almost surely, 2^55720197120 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 55720197120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104826280464).

55720197120 is an abundant number, since it is smaller than the sum of its proper divisors (153932363808).

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

55720197120 is a wasteful number, since it uses less digits than its factorization.

55720197120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 39.

Adding to 55720197120 its reverse (2179102755), we get a palindrome (57899299875).

The spelling of 55720197120 in words is "fifty-five billion, seven hundred twenty million, one hundred ninety-seven thousand, one hundred twenty".