2291878791 has 12 divisors (see below), whose sum is σ = 3312289032. Its totient is φ = 1527089616.

The previous prime is 2291878747. The next prime is 2291878807. The reversal of 2291878791 is 1978781922.

It is not a de Polignac number, because 2291878791 - 2¹³ = 2291870599 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291878711) 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, 51396 + ... + 85001.

It is an arithmetic number, because the mean of its divisors is an integer number (276024086).

Almost surely, 2^2291878791 is an apocalyptic number.

2291878791 is a deficient number, since it is larger than the sum of its proper divisors (1020410241).

2291878791 is a wasteful number, since it uses less digits than its factorization.

2291878791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138270 (or 138267 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The square root of 2291878791 is about 47873.5709029523. The cubic root of 2291878791 is about 1318.4506598020.

The spelling of 2291878791 in words is "two billion, two hundred ninety-one million, eight hundred seventy-eight thousand, seven hundred ninety-one".