640374245297280 has 256 divisors, whose sum is σ = 2442453051830400. Its totient is φ = 157630583402496.

The previous prime is 640374245297273. The next prime is 640374245297323. The reversal of 640374245297280 is 82792542473046.

640374245297280 is a `hidden beast` number, since 6 + 4 + 0 + 3 + 7 + 4 + 24 + 529 + 7 + 2 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1425109774 + ... + 1425559053.

Almost surely, 2^{640374245297280} is an apocalyptic number.

640374245297280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640374245297280 is an abundant number, since it is smaller than the sum of its proper divisors (1802078806533120).

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

640374245297280 is a wasteful number, since it uses less digits than its factorization.

640374245297280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850668868 (or 2850668850 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 63.

The spelling of 640374245297280 in words is "six hundred forty trillion, three hundred seventy-four billion, two hundred forty-five million, two hundred ninety-seven thousand, two hundred eighty".