799774278601 has 3 divisors (see below), whose sum is σ = 799775172903. Its totient is φ = 799773384300.

The previous prime is 799774278599. The next prime is 799774278619. The reversal of 799774278601 is 106872477997.

The square root of 799774278601 is 894301.

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

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., 84971667001 + 714802611600 = 291499^2 + 845460^2 .

It is not a de Polignac number, because 799774278601 - 2¹ = 799774278599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (799774278631) 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, 447151 + ... + 1341451.

It is an arithmetic number, because the mean of its divisors is an integer number (266591724301).

Almost surely, 2^799774278601 is an apocalyptic number.

799774278601 is the 894301-st square number.

799774278601 is the 447151-st centered octagonal number.

It is an amenable number.

799774278601 is a deficient number, since it is larger than the sum of its proper divisors (894302).

799774278601 is an frugal number, since it uses more digits than its factorization.

799774278601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788602 (or 894301 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 67.

The spelling of 799774278601 in words is "seven hundred ninety-nine billion, seven hundred seventy-four million, two hundred seventy-eight thousand, six hundred one".