640325121132 has 48 divisors (see below), whose sum is σ = 1582101061632. Its totient is φ = 200870903040.

The previous prime is 640325121103. The next prime is 640325121239. The reversal of 640325121132 is 231121523046.

640325121132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640325121132² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 640325121132.

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, 2708053 + ... + 2934995.

It is an arithmetic number, because the mean of its divisors is an integer number (32960438784).

Almost surely, 2^640325121132 is an apocalyptic number.

It is an amenable number.

640325121132 is an abundant number, since it is smaller than the sum of its proper divisors (941775940500).

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

640325121132 is a wasteful number, since it uses less digits than its factorization.

640325121132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240798 (or 240796 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 640325121132 its reverse (231121523046), we get a palindrome (871446644178).

The spelling of 640325121132 in words is "six hundred forty billion, three hundred twenty-five million, one hundred twenty-one thousand, one hundred thirty-two".