648131580 has 36 divisors (see below), whose sum is σ = 1965999672. Its totient is φ = 172835040.

The previous prime is 648131573. The next prime is 648131597. The reversal of 648131580 is 85131846.

648131580 is a `hidden beast` number, since 6 + 48 + 1 + 31 + 580 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1800186 + ... + 1800545.

It is an arithmetic number, because the mean of its divisors is an integer number (54611102).

Almost surely, 2^648131580 is an apocalyptic number.

648131580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648131580 is an abundant number, since it is smaller than the sum of its proper divisors (1317868092).

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

648131580 is a wasteful number, since it uses less digits than its factorization.

648131580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3600746 (or 3600741 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 648131580 is about 25458.4284668163. The cubic root of 648131580 is about 865.4083095780.

The spelling of 648131580 in words is "six hundred forty-eight million, one hundred thirty-one thousand, five hundred eighty".