55878640980 has 96 divisors (see below), whose sum is σ = 161007799680. Its totient is φ = 14469465600.

The previous prime is 55878640969. The next prime is 55878640991. The reversal of 55878640980 is 8904687855.

It is an interprime number because it is at equal distance from previous prime (55878640969) and next prime (55878640991).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1105255 + ... + 1154705.

It is an arithmetic number, because the mean of its divisors is an integer number (1677164580).

Almost surely, 2^55878640980 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 55878640980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80503899840).

55878640980 is an abundant number, since it is smaller than the sum of its proper divisors (105129158700).

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

55878640980 is a wasteful number, since it uses less digits than its factorization.

55878640980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50009 (or 50007 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 60.

The spelling of 55878640980 in words is "fifty-five billion, eight hundred seventy-eight million, six hundred forty thousand, nine hundred eighty".