55486131820 has 48 divisors (see below), whose sum is σ = 137462427648. Its totient is φ = 18410143680.

The previous prime is 55486131803. The next prime is 55486131863. The reversal of 55486131820 is 2813168455.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6388072 + ... + 6396751.

It is an arithmetic number, because the mean of its divisors is an integer number (2863800576).

Almost surely, 2^55486131820 is an apocalyptic number.

It is an amenable number.

55486131820 is an abundant number, since it is smaller than the sum of its proper divisors (81976295828).

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

55486131820 is a wasteful number, since it uses less digits than its factorization.

55486131820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12784870 (or 12784868 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 55486131820 in words is "fifty-five billion, four hundred eighty-six million, one hundred thirty-one thousand, eight hundred twenty".