640645460053222 has 32 divisors (see below), whose sum is σ = 1068410022543360. Its totient is φ = 286107492396960.

The previous prime is 640645460053217. The next prime is 640645460053223. The reversal of 640645460053222 is 222350064546046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640645460053223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44967118 + ... + 57474625.

It is an arithmetic number, because the mean of its divisors is an integer number (33387813204480).

Almost surely, 2^{640645460053222} is an apocalyptic number.

640645460053222 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

640645460053222 is a deficient number, since it is larger than the sum of its proper divisors (427764562490138).

640645460053222 is a wasteful number, since it uses less digits than its factorization.

640645460053222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102449548.

The product of its (nonzero) digits is 8294400, while the sum is 49.

The spelling of 640645460053222 in words is "six hundred forty trillion, six hundred forty-five billion, four hundred sixty million, fifty-three thousand, two hundred twenty-two".