648580860 has 36 divisors (see below), whose sum is σ = 1967362488. Its totient is φ = 172954848.

The previous prime is 648580843. The next prime is 648580913. The reversal of 648580860 is 68085846.

648580860 is a `hidden beast` number, since 6 + 4 + 8 + 580 + 8 + 60 = 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 (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1801434 + ... + 1801793.

It is an arithmetic number, because the mean of its divisors is an integer number (54648958).

Almost surely, 2^648580860 is an apocalyptic number.

648580860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648580860 is an abundant number, since it is smaller than the sum of its proper divisors (1318781628).

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

648580860 is a wasteful number, since it uses less digits than its factorization.

648580860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3603242 (or 3603237 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 648580860 is about 25467.2507350126. The cubic root of 648580860 is about 865.6082282631.

The spelling of 648580860 in words is "six hundred forty-eight million, five hundred eighty thousand, eight hundred sixty".