55120896870 has 128 divisors (see below), whose sum is σ = 143913369600. Its totient is φ = 13430914560.

The previous prime is 55120896869. The next prime is 55120896899. The reversal of 55120896870 is 7869802155.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 28280656 + ... + 28282604.

It is an arithmetic number, because the mean of its divisors is an integer number (1124323200).

Almost surely, 2^55120896870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55120896870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71956684800).

55120896870 is an abundant number, since it is smaller than the sum of its proper divisors (88792472730).

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

55120896870 is a wasteful number, since it uses less digits than its factorization.

55120896870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The spelling of 55120896870 in words is "fifty-five billion, one hundred twenty million, eight hundred ninety-six thousand, eight hundred seventy".