648153860 has 24 divisors (see below), whose sum is σ = 1379771736. Its totient is φ = 255709440.

The previous prime is 648153851. The next prime is 648153893. The reversal of 648153860 is 68351846.

It can be written as a sum of positive squares in 4 ways, for example, as 145924 + 648007936 = 382^2 + 25456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220511 + ... + 223430.

It is an arithmetic number, because the mean of its divisors is an integer number (57490489).

Almost surely, 2^648153860 is an apocalyptic number.

It is an amenable number.

648153860 is an abundant number, since it is smaller than the sum of its proper divisors (731617876).

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

648153860 is a wasteful number, since it uses less digits than its factorization.

648153860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444023 (or 444021 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 648153860 is about 25458.8660391621. The cubic root of 648153860 is about 865.4182258136.

The spelling of 648153860 in words is "six hundred forty-eight million, one hundred fifty-three thousand, eight hundred sixty".