640520522602 has 32 divisors (see below), whose sum is σ = 1035429249024. Its totient is φ = 296300862000.

The previous prime is 640520522591. The next prime is 640520522623. The reversal of 640520522602 is 206225025046.

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, 2667013 + ... + 2897239.

It is an arithmetic number, because the mean of its divisors is an integer number (32357164032).

Almost surely, 2^640520522602 is an apocalyptic number.

640520522602 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

640520522602 is a deficient number, since it is larger than the sum of its proper divisors (394908726422).

640520522602 is a wasteful number, since it uses less digits than its factorization.

640520522602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232234.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 640520522602 its reverse (206225025046), we get a palindrome (846745547648).

The spelling of 640520522602 in words is "six hundred forty billion, five hundred twenty million, five hundred twenty-two thousand, six hundred two".