745195239639 has 12 divisors (see below), whose sum is σ = 1076413929136. Its totient is φ = 496787224032.

The previous prime is 745195239631. The next prime is 745195239697. The reversal of 745195239639 is 936932591547.

745195239639 is a `hidden beast` number, since 7 + 4 + 5 + 19 + 523 + 96 + 3 + 9 = 666.

745195239639 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745195239639 - 2³ = 745195239631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745195239631) 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, 291694 + ... + 1255179.

Almost surely, 2^745195239639 is an apocalyptic number.

745195239639 is a deficient number, since it is larger than the sum of its proper divisors (331218689497).

745195239639 is a wasteful number, since it uses less digits than its factorization.

745195239639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600406 (or 1600403 counting only the distinct ones).

The product of its digits is 55112400, while the sum is 63.

The spelling of 745195239639 in words is "seven hundred forty-five billion, one hundred ninety-five million, two hundred thirty-nine thousand, six hundred thirty-nine".