640039043874048 has 216 divisors, whose sum is σ = 2133976333009248. Its totient is φ = 168801505947648.

The previous prime is 640039043873963. The next prime is 640039043874091. The reversal of 640039043874048 is 840478340930046.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 640039043873982 and 640039043874000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653658486 + ... + 654636917.

It is an arithmetic number, because the mean of its divisors is an integer number (9879520060228).

Almost surely, 2^{640039043874048} is an apocalyptic number.

It is an amenable number.

640039043874048 is an abundant number, since it is smaller than the sum of its proper divisors (1493937289135200).

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

640039043874048 is a wasteful number, since it uses less digits than its factorization.

640039043874048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308295449 (or 1308295428 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 60.

The spelling of 640039043874048 in words is "six hundred forty trillion, thirty-nine billion, forty-three million, eight hundred seventy-four thousand, forty-eight".