555551387780 has 48 divisors (see below), whose sum is σ = 1167992118720. Its totient is φ = 221966594688.

The previous prime is 555551387777. The next prime is 555551387827. The reversal of 555551387780 is 87783155555.

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, 81948431 + ... + 81955209.

It is an arithmetic number, because the mean of its divisors is an integer number (24333169140).

Almost surely, 2^555551387780 is an apocalyptic number.

It is an amenable number.

555551387780 is an abundant number, since it is smaller than the sum of its proper divisors (612440730940).

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

555551387780 is a wasteful number, since it uses less digits than its factorization.

555551387780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10868 (or 10866 counting only the distinct ones).

The product of its (nonzero) digits is 29400000, while the sum is 59.

The spelling of 555551387780 in words is "five hundred fifty-five billion, five hundred fifty-one million, three hundred eighty-seven thousand, seven hundred eighty".