648715540 has 48 divisors (see below), whose sum is σ = 1488279744. Its totient is φ = 235558400.

The previous prime is 648715519. The next prime is 648715589. The reversal of 648715540 is 45517846.

It is a junction number, because it is equal to n+sod(n) for n = 648715493 and 648715502.

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, 192147 + ... + 195493.

It is an arithmetic number, because the mean of its divisors is an integer number (31005828).

Almost surely, 2^648715540 is an apocalyptic number.

It is an amenable number.

648715540 is an abundant number, since it is smaller than the sum of its proper divisors (839564204).

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

648715540 is a wasteful number, since it uses less digits than its factorization.

648715540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4246 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 648715540 is about 25469.8947779530. The cubic root of 648715540 is about 865.6681396044.

The spelling of 648715540 in words is "six hundred forty-eight million, seven hundred fifteen thousand, five hundred forty".