1645620370312 has 16 divisors (see below), whose sum is σ = 3099374691840. Its totient is φ = 819120452496.

The previous prime is 1645620370309. The next prime is 1645620370333. The reversal of 1645620370312 is 2130730265461.

It is a happy number.

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, 461214688 + ... + 461218255.

It is an arithmetic number, because the mean of its divisors is an integer number (193710918240).

Almost surely, 2^{1645620370312} is an apocalyptic number.

It is an amenable number.

1645620370312 is a deficient number, since it is larger than the sum of its proper divisors (1453754321528).

1645620370312 is a wasteful number, since it uses less digits than its factorization.

1645620370312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922433172 (or 922433168 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 1645620370312 in words is "one trillion, six hundred forty-five billion, six hundred twenty million, three hundred seventy thousand, three hundred twelve".