645415605122 has 8 divisors (see below), whose sum is σ = 968127117456. Its totient is φ = 322706565972.

The previous prime is 645415605103. The next prime is 645415605137. The reversal of 645415605122 is 221506514546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×645415605122² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 645415605122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317213 + ... + 1179599.

It is an arithmetic number, because the mean of its divisors is an integer number (121015889682).

Almost surely, 2^645415605122 is an apocalyptic number.

645415605122 is a deficient number, since it is larger than the sum of its proper divisors (322711512334).

645415605122 is a wasteful number, since it uses less digits than its factorization.

645415605122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236592.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 645415605122 in words is "six hundred forty-five billion, four hundred fifteen million, six hundred five thousand, one hundred twenty-two".