764556149 has 4 divisors (see below), whose sum is σ = 873778464. Its totient is φ = 655333836.

The previous prime is 764556139. The next prime is 764556157. The reversal of 764556149 is 941655467.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 941655467 = 20173 ⋅46679.

It is a cyclic number.

It is not a de Polignac number, because 764556149 - 2²⁰ = 763507573 is a prime.

It is a super-2 number, since 2×764556149² = 1169092209947420402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764556119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54611147 + ... + 54611160.

It is an arithmetic number, because the mean of its divisors is an integer number (218444616).

Almost surely, 2^764556149 is an apocalyptic number.

It is an amenable number.

764556149 is a deficient number, since it is larger than the sum of its proper divisors (109222315).

764556149 is a wasteful number, since it uses less digits than its factorization.

764556149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109222314.

The product of its digits is 907200, while the sum is 47.

The square root of 764556149 is about 27650.6084743175. The cubic root of 764556149 is about 914.4005146805.

The spelling of 764556149 in words is "seven hundred sixty-four million, five hundred fifty-six thousand, one hundred forty-nine".