764617149 has 12 divisors (see below), whose sum is σ = 1105513500. Its totient is φ = 509252544.

The previous prime is 764617141. The next prime is 764617151. The reversal of 764617149 is 941716467.

It can be written as a sum of positive squares in 2 ways, for example, as 713851524 + 50765625 = 26718^2 + 7125^2 .

It is not a de Polignac number, because 764617149 - 2³ = 764617141 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764617141) 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, 31054 + ... + 49935.

It is an arithmetic number, because the mean of its divisors is an integer number (92126125).

Almost surely, 2^764617149 is an apocalyptic number.

It is an amenable number.

764617149 is a deficient number, since it is larger than the sum of its proper divisors (340896351).

764617149 is a wasteful number, since it uses less digits than its factorization.

764617149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82044 (or 82041 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 764617149 is about 27651.7115021837. The cubic root of 764617149 is about 914.4248324707.

The spelling of 764617149 in words is "seven hundred sixty-four million, six hundred seventeen thousand, one hundred forty-nine".