640264462422 has 16 divisors (see below), whose sum is σ = 1379031150000. Its totient is φ = 197004449952.

The previous prime is 640264462393. The next prime is 640264462427. The reversal of 640264462422 is 224264462046.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640264462427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104259297 + ... + 4104259452.

It is an arithmetic number, because the mean of its divisors is an integer number (86189446875).

Almost surely, 2^640264462422 is an apocalyptic number.

640264462422 is an abundant number, since it is smaller than the sum of its proper divisors (738766687578).

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

640264462422 is a wasteful number, since it uses less digits than its factorization.

640264462422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208518767.

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 640264462422 in words is "six hundred forty billion, two hundred sixty-four million, four hundred sixty-two thousand, four hundred twenty-two".