2791121049 has 12 divisors (see below), whose sum is σ = 4038161556. Its totient is φ = 1857727872.

The previous prime is 2791121027. The next prime is 2791121101. The reversal of 2791121049 is 9401211972.

It can be written as a sum of positive squares in 2 ways, for example, as 1488416400 + 1302704649 = 38580^2 + 36093^2 .

It is not a de Polignac number, because 2791121049 - 2⁸ = 2791120793 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2791121449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 245764 + ... + 256869.

It is an arithmetic number, because the mean of its divisors is an integer number (336513463).

Almost surely, 2^2791121049 is an apocalyptic number.

It is an amenable number.

2791121049 is a deficient number, since it is larger than the sum of its proper divisors (1247040507).

2791121049 is a wasteful number, since it uses less digits than its factorization.

2791121049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503256 (or 503253 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2791121049 is about 52831.0614033071. The cubic root of 2791121049 is about 1407.9683445731.

The spelling of 2791121049 in words is "two billion, seven hundred ninety-one million, one hundred twenty-one thousand, forty-nine".