779902700641 has 3 divisors (see below), whose sum is σ = 779903583763. Its totient is φ = 779901817520.

The previous prime is 779902700611. The next prime is 779902700663. The reversal of 779902700641 is 146007209977.

The square root of 779902700641 is 883121.

It is a perfect power (a square), and thus also a powerful number.

779902700641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1766241 + 779900934400 = 1329^2 + 883120^2 .

It is not a de Polignac number, because 779902700641 - 2¹⁷ = 779902569569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (779902700611) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 441561 + ... + 1324681.

Almost surely, 2^779902700641 is an apocalyptic number.

779902700641 is the 883121-st square number.

779902700641 is the 441561-st centered octagonal number.

It is an amenable number.

779902700641 is a deficient number, since it is larger than the sum of its proper divisors (883122).

779902700641 is an frugal number, since it uses more digits than its factorization.

779902700641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766242 (or 883121 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 52.

The spelling of 779902700641 in words is "seven hundred seventy-nine billion, nine hundred two million, seven hundred thousand, six hundred forty-one".