640262645604200 has 48 divisors (see below), whose sum is σ = 1488659349247980. Its totient is φ = 256096680053760.

The previous prime is 640262645604199. The next prime is 640262645604277. The reversal of 640262645604200 is 2406546262046.

It can be written as a sum of positive squares in 6 ways, for example, as 153704899337284 + 486557746266916 = 12397778^2 + 22058054^2 .

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, 46232987 + ... + 58463786.

Almost surely, 2^{640262645604200} is an apocalyptic number.

It is an amenable number.

640262645604200 is an abundant number, since it is smaller than the sum of its proper divisors (848396703643780).

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

640262645604200 is a wasteful number, since it uses less digits than its factorization.

640262645604200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104727366 (or 104727357 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 640262645604200 in words is "six hundred forty trillion, two hundred sixty-two billion, six hundred forty-five million, six hundred four thousand, two hundred".