628628891580 has 48 divisors (see below), whose sum is σ = 1955734331040. Its totient is φ = 167634370944.

The previous prime is 628628891573. The next prime is 628628891593. The reversal of 628628891580 is 85198826826.

628628891580 is a `hidden beast` number, since 6 + 28 + 6 + 28 + 8 + 9 + 1 + 580 = 666.

It is a congruent number.

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, 582063249 + ... + 582064328.

It is an arithmetic number, because the mean of its divisors is an integer number (40744465230).

Almost surely, 2^628628891580 is an apocalyptic number.

628628891580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

628628891580 is an abundant number, since it is smaller than the sum of its proper divisors (1327105439460).

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

628628891580 is a wasteful number, since it uses less digits than its factorization.

628628891580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164127595 (or 1164127587 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The spelling of 628628891580 in words is "six hundred twenty-eight billion, six hundred twenty-eight million, eight hundred ninety-one thousand, five hundred eighty".