640533116262 has 32 divisors (see below), whose sum is σ = 1388397138912. Its totient is φ = 195831777024.

The previous prime is 640533116219. The next prime is 640533116281. The reversal of 640533116262 is 262611335046.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 640533116262.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26140503 + ... + 26164994.

It is an arithmetic number, because the mean of its divisors is an integer number (43387410591).

Almost surely, 2^640533116262 is an apocalyptic number.

640533116262 is an abundant number, since it is smaller than the sum of its proper divisors (747864022650).

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

640533116262 is a wasteful number, since it uses less digits than its factorization.

640533116262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52305672.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 640533116262 in words is "six hundred forty billion, five hundred thirty-three million, one hundred sixteen thousand, two hundred sixty-two".