55499999980 has 48 divisors (see below), whose sum is σ = 120386165760. Its totient is φ = 21470212800.

The previous prime is 55499999969. The next prime is 55500000043. The reversal of 55499999980 is 8999999455.

It is a junction number, because it is equal to n+sod(n) for n = 55499999897 and 55499999906.

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 15 ways as a sum of consecutive naturals, for example, 976135 + ... + 1031425.

It is an arithmetic number, because the mean of its divisors is an integer number (2508045120).

Almost surely, 2^55499999980 is an apocalyptic number.

It is an amenable number.

55499999980 is an abundant number, since it is smaller than the sum of its proper divisors (64886165780).

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

55499999980 is a wasteful number, since it uses less digits than its factorization.

55499999980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56950 (or 56948 counting only the distinct ones).

The product of its (nonzero) digits is 425152800, while the sum is 76.

The spelling of 55499999980 in words is "fifty-five billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred eighty".