222644640640 has 64 divisors (see below), whose sum is σ = 546645303360. Its totient is φ = 86650877952.

The previous prime is 222644640613. The next prime is 222644640661. The reversal of 222644640640 is 46046446222.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 222644640593 and 222644640602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4677432 + ... + 4724791.

It is an arithmetic number, because the mean of its divisors is an integer number (8541332865).

Almost surely, 2^222644640640 is an apocalyptic number.

222644640640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222644640640 is an abundant number, since it is smaller than the sum of its proper divisors (324000662720).

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

222644640640 is an equidigital number, since it uses as much as digits as its factorization.

222644640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9402279 (or 9402267 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 222644640640 in words is "two hundred twenty-two billion, six hundred forty-four million, six hundred forty thousand, six hundred forty".