2291768613 has 8 divisors (see below), whose sum is σ = 3395212800. Its totient is φ = 1527845724.

The previous prime is 2291768603. The next prime is 2291768639. The reversal of 2291768613 is 3168671922.

2291768613 is a `hidden beast` number, since 2 + 29 + 1 + 7 + 6 + 8 + 613 = 666.

It is not a de Polignac number, because 2291768613 - 2¹⁰ = 2291767589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291768603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42440133 + ... + 42440186.

It is an arithmetic number, because the mean of its divisors is an integer number (424401600).

Almost surely, 2^2291768613 is an apocalyptic number.

It is an amenable number.

2291768613 is a deficient number, since it is larger than the sum of its proper divisors (1103444187).

2291768613 is an equidigital number, since it uses as much as digits as its factorization.

2291768613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84880328 (or 84880322 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 2291768613 is about 47872.4201706995. The cubic root of 2291768613 is about 1318.4295320726.

The spelling of 2291768613 in words is "two billion, two hundred ninety-one million, seven hundred sixty-eight thousand, six hundred thirteen".