745637919 has 48 divisors (see below), whose sum is σ = 1139854464. Its totient is φ = 430920000.

The previous prime is 745637917. The next prime is 745637941. The reversal of 745637919 is 919736547.

It is not a de Polignac number, because 745637919 - 2¹ = 745637917 is a prime.

It is a super-2 number, since 2×745637919² = 1111951812501301122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745637911) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2970544 + ... + 2970794.

It is an arithmetic number, because the mean of its divisors is an integer number (23746968).

Almost surely, 2^745637919 is an apocalyptic number.

745637919 is a deficient number, since it is larger than the sum of its proper divisors (394216545).

745637919 is a wasteful number, since it uses less digits than its factorization.

745637919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 497 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 51.

The square root of 745637919 is about 27306.3713993639. The cubic root of 745637919 is about 906.7954421839.

The spelling of 745637919 in words is "seven hundred forty-five million, six hundred thirty-seven thousand, nine hundred nineteen".