745687775 has 24 divisors (see below), whose sum is σ = 1112369280. Its totient is φ = 484414560.

The previous prime is 745687771. The next prime is 745687777. The reversal of 745687775 is 577786547.

It is a happy number.

It is not a de Polignac number, because 745687775 - 2² = 745687771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 745687775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745687771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108809 + ... + 115458.

It is an arithmetic number, because the mean of its divisors is an integer number (46348720).

Almost surely, 2^745687775 is an apocalyptic number.

745687775 is a deficient number, since it is larger than the sum of its proper divisors (366681505).

745687775 is a wasteful number, since it uses less digits than its factorization.

745687775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224303 (or 224298 counting only the distinct ones).

The product of its digits is 11524800, while the sum is 56.

The square root of 745687775 is about 27307.2842846007. The cubic root of 745687775 is about 906.8156522549.

The spelling of 745687775 in words is "seven hundred forty-five million, six hundred eighty-seven thousand, seven hundred seventy-five".