2769398721 has 16 divisors (see below), whose sum is σ = 4119846720. Its totient is φ = 1838600640.

The previous prime is 2769398683. The next prime is 2769398773. The reversal of 2769398721 is 1278939672.

It is not a de Polignac number, because 2769398721 - 2¹⁵ = 2769365953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2769398921) 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, 206295 + ... + 219308.

It is an arithmetic number, because the mean of its divisors is an integer number (257490420).

Almost surely, 2^2769398721 is an apocalyptic number.

It is an amenable number.

2769398721 is a deficient number, since it is larger than the sum of its proper divisors (1350447999).

2769398721 is a wasteful number, since it uses less digits than its factorization.

2769398721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425853 (or 425847 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 2769398721 is about 52625.0769215590. The cubic root of 2769398721 is about 1404.3062512224.

The spelling of 2769398721 in words is "two billion, seven hundred sixty-nine million, three hundred ninety-eight thousand, seven hundred twenty-one".