645613514336 has 24 divisors (see below), whose sum is σ = 1452630407760. Its totient is φ = 276691506048.

The previous prime is 645613514311. The next prime is 645613514417. The reversal of 645613514336 is 633415316546.

It is a happy number.

It is a super-4 number, since 4×645613514336⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent 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, 1441101371 + ... + 1441101818.

It is an arithmetic number, because the mean of its divisors is an integer number (60526266990).

Almost surely, 2^645613514336 is an apocalyptic number.

It is an amenable number.

645613514336 is an abundant number, since it is smaller than the sum of its proper divisors (807016893424).

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

645613514336 is a wasteful number, since it uses less digits than its factorization.

645613514336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882203206 (or 2882203198 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 47.

The spelling of 645613514336 in words is "six hundred forty-five billion, six hundred thirteen million, five hundred fourteen thousand, three hundred thirty-six".