745688685 has 16 divisors (see below), whose sum is σ = 1363545216. Its totient is φ = 340886208.

The previous prime is 745688677. The next prime is 745688701. The reversal of 745688685 is 586886547.

It is a happy number.

745688685 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 745688685 - 2³ = 745688677 is a prime.

It is a super-2 number, since 2×745688685² = 1112103229874058450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3550794 + ... + 3551003.

It is an arithmetic number, because the mean of its divisors is an integer number (85221576).

Almost surely, 2^745688685 is an apocalyptic number.

It is an amenable number.

745688685 is a deficient number, since it is larger than the sum of its proper divisors (617856531).

745688685 is a wasteful number, since it uses less digits than its factorization.

745688685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7101812.

The product of its digits is 12902400, while the sum is 57.

The square root of 745688685 is about 27307.3009468164. The cubic root of 745688685 is about 906.8160211322.

It can be divided in two parts, 7456 and 88685, that added together give a triangular number (96141 = T₄₃₈).

The spelling of 745688685 in words is "seven hundred forty-five million, six hundred eighty-eight thousand, six hundred eighty-five".