764777121 has 16 divisors (see below), whose sum is σ = 1044985536. Its totient is φ = 497322176.

The previous prime is 764777093. The next prime is 764777129. The reversal of 764777121 is 121777467.

It is a cyclic number.

It is not a de Polignac number, because 764777121 - 2⁷ = 764776993 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (764777129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13606 + ... + 41408.

It is an arithmetic number, because the mean of its divisors is an integer number (65311596).

Almost surely, 2^764777121 is an apocalyptic number.

It is an amenable number.

764777121 is a deficient number, since it is larger than the sum of its proper divisors (280208415).

764777121 is a wasteful number, since it uses less digits than its factorization.

764777121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28032.

The product of its digits is 115248, while the sum is 42.

The square root of 764777121 is about 27654.6039747453. The cubic root of 764777121 is about 914.4885995333.

The spelling of 764777121 in words is "seven hundred sixty-four million, seven hundred seventy-seven thousand, one hundred twenty-one".