616644450207 has 20 divisors (see below), whose sum is σ = 923565392640. Its totient is φ = 410022921024.

The previous prime is 616644450157. The next prime is 616644450223. The reversal of 616644450207 is 702054446616.

616644450207 is a `hidden beast` number, since 616 + 6 + 4 + 4 + 4 + 5 + 0 + 20 + 7 = 666.

It is not a de Polignac number, because 616644450207 - 2²⁰ = 616643401631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616644450407) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9907482 + ... + 9969527.

It is an arithmetic number, because the mean of its divisors is an integer number (46178269632).

Almost surely, 2^616644450207 is an apocalyptic number.

616644450207 is a deficient number, since it is larger than the sum of its proper divisors (306920942433).

616644450207 is a wasteful number, since it uses less digits than its factorization.

616644450207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19877404 (or 19877395 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 616644450207 in words is "six hundred sixteen billion, six hundred forty-four million, four hundred fifty thousand, two hundred seven".