2696319991 has 4 divisors (see below), whose sum is σ = 2696588392. Its totient is φ = 2696051592.

The previous prime is 2696319973. The next prime is 2696320019. The reversal of 2696319991 is 1999136962.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1999136962 = 2 ⋅999568481.

It is a cyclic number.

It is not a de Polignac number, because 2696319991 - 2⁵ = 2696319959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2696316991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118521 + ... + 139426.

It is an arithmetic number, because the mean of its divisors is an integer number (674147098).

Almost surely, 2^2696319991 is an apocalyptic number.

2696319991 is a deficient number, since it is larger than the sum of its proper divisors (268401).

2696319991 is a wasteful number, since it uses less digits than its factorization.

2696319991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268400.

The product of its digits is 1417176, while the sum is 55.

The square root of 2696319991 is about 51926.1012497569. The cubic root of 2696319991 is about 1391.8437295327.

The spelling of 2696319991 in words is "two billion, six hundred ninety-six million, three hundred nineteen thousand, nine hundred ninety-one".