645268422 has 32 divisors (see below), whose sum is σ = 1379244672. Its totient is φ = 200541824.

The previous prime is 645268411. The next prime is 645268447. The reversal of 645268422 is 224862546.

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, 18648 + ... + 40475.

It is an arithmetic number, because the mean of its divisors is an integer number (43101396).

Almost surely, 2^645268422 is an apocalyptic number.

645268422 is an abundant number, since it is smaller than the sum of its proper divisors (733976250).

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

645268422 is a wasteful number, since it uses less digits than its factorization.

645268422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59252.

The product of its digits is 184320, while the sum is 39.

The square root of 645268422 is about 25402.1342016768. The cubic root of 645268422 is about 864.1320983936.

The spelling of 645268422 in words is "six hundred forty-five million, two hundred sixty-eight thousand, four hundred twenty-two".