764816871 has 32 divisors (see below), whose sum is σ = 1278789120. Its totient is φ = 395800704.

The previous prime is 764816867. The next prime is 764816879. The reversal of 764816871 is 178618467.

It is not a de Polignac number, because 764816871 - 2² = 764816867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 764816871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764816879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11961 + ... + 40898.

It is an arithmetic number, because the mean of its divisors is an integer number (39962160).

Almost surely, 2^764816871 is an apocalyptic number.

764816871 is a deficient number, since it is larger than the sum of its proper divisors (513972249).

764816871 is a wasteful number, since it uses less digits than its factorization.

764816871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52935.

The product of its digits is 451584, while the sum is 48.

The square root of 764816871 is about 27655.3226522491. The cubic root of 764816871 is about 914.5044430564.

The spelling of 764816871 in words is "seven hundred sixty-four million, eight hundred sixteen thousand, eight hundred seventy-one".