764226861 has 4 divisors (see below), whose sum is σ = 1018969152. Its totient is φ = 509484572.

The previous prime is 764226791. The next prime is 764226913. The reversal of 764226861 is 168622467.

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.

It is a cyclic number.

It is not a de Polignac number, because 764226861 - 2⁹ = 764226349 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 (764226061) 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, 127371141 + ... + 127371146.

It is an arithmetic number, because the mean of its divisors is an integer number (254742288).

Almost surely, 2^764226861 is an apocalyptic number.

It is an amenable number.

764226861 is a deficient number, since it is larger than the sum of its proper divisors (254742291).

764226861 is a wasteful number, since it uses less digits than its factorization.

764226861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254742290.

The product of its digits is 193536, while the sum is 42.

The square root of 764226861 is about 27644.6533890371. The cubic root of 764226861 is about 914.2692209206.

The spelling of 764226861 in words is "seven hundred sixty-four million, two hundred twenty-six thousand, eight hundred sixty-one".