648297918720 has 108 divisors (see below), whose sum is σ = 2243043307596. Its totient is φ = 172879441920.

The previous prime is 648297918613. The next prime is 648297918721. The reversal of 648297918720 is 27819792846.

648297918720 is a `hidden beast` number, since 6 + 482 + 9 + 79 + 1 + 87 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 65896943616 + 582400975104 = 256704^2 + 763152^2 .

It is not an unprimeable number, because it can be changed into a prime (648297918721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28126411 + ... + 28149450.

Almost surely, 2^648297918720 is an apocalyptic number.

648297918720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

648297918720 is an abundant number, since it is smaller than the sum of its proper divisors (1594745388876).

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

648297918720 is a wasteful number, since it uses less digits than its factorization.

648297918720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56275888 (or 56275871 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 63.

The spelling of 648297918720 in words is "six hundred forty-eight billion, two hundred ninety-seven million, nine hundred eighteen thousand, seven hundred twenty".