615620960640 has 256 divisors, whose sum is σ = 2491799616000. Its totient is φ = 140713334784.

The previous prime is 615620960627. The next prime is 615620960651. The reversal of 615620960640 is 46069026516.

615620960640 is a `hidden beast` number, since 6 + 15 + 6 + 20 + 9 + 606 + 4 + 0 = 666.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2423770 + ... + 2665689.

It is an arithmetic number, because the mean of its divisors is an integer number (9733592250).

Almost surely, 2^615620960640 is an apocalyptic number.

615620960640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

615620960640 is an abundant number, since it is smaller than the sum of its proper divisors (1876178655360).

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

615620960640 is a wasteful number, since it uses less digits than its factorization.

615620960640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089494 (or 5089476 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 615620960640 in words is "six hundred fifteen billion, six hundred twenty million, nine hundred sixty thousand, six hundred forty".