744640525 has 12 divisors (see below), whose sum is σ = 963500832. Its totient is φ = 569811440.

The previous prime is 744640493. The next prime is 744640531. The reversal of 744640525 is 525046447.

It is not a de Polignac number, because 744640525 - 2⁵ = 744640493 is a prime.

It is a super-2 number, since 2×744640525² = 1108979022944551250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 646939 + ... + 648088.

It is an arithmetic number, because the mean of its divisors is an integer number (80291736).

Almost surely, 2^744640525 is an apocalyptic number.

It is an amenable number.

744640525 is a deficient number, since it is larger than the sum of its proper divisors (218860307).

744640525 is a wasteful number, since it uses less digits than its factorization.

744640525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1295060 (or 1295055 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 744640525 is about 27288.1022608755. The cubic root of 744640525 is about 906.3909402677.

The spelling of 744640525 in words is "seven hundred forty-four million, six hundred forty thousand, five hundred twenty-five".