2640431785800 has 48 divisors (see below), whose sum is σ = 8185338537840. Its totient is φ = 704115142720.

The previous prime is 2640431785763. The next prime is 2640431785819. The reversal of 2640431785800 is 85871340462.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2640431785800.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200359222 + ... + 2200360421.

It is an arithmetic number, because the mean of its divisors is an integer number (170527886205).

Almost surely, 2^{2640431785800} is an apocalyptic number.

2640431785800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2640431785800 is an abundant number, since it is smaller than the sum of its proper divisors (5544906752040).

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

2640431785800 is a wasteful number, since it uses less digits than its factorization.

2640431785800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4400719662 (or 4400719653 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 2640431785800 in words is "two trillion, six hundred forty billion, four hundred thirty-one million, seven hundred eighty-five thousand, eight hundred".