645593097222 has 24 divisors (see below), whose sum is σ = 1398899680464. Its totient is φ = 215180062704.

The previous prime is 645593097209. The next prime is 645593097229. The reversal of 645593097222 is 222790395546.

645593097222 is a `hidden beast` number, since 6 + 45 + 593 + 0 + 9 + 7 + 2 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645593097229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1243018 + ... + 1684125.

It is an arithmetic number, because the mean of its divisors is an integer number (58287486686).

Almost surely, 2^645593097222 is an apocalyptic number.

645593097222 is an abundant number, since it is smaller than the sum of its proper divisors (753306583242).

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

645593097222 is a wasteful number, since it uses less digits than its factorization.

645593097222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939404 (or 2939401 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 645593097222 in words is "six hundred forty-five billion, five hundred ninety-three million, ninety-seven thousand, two hundred twenty-two".