2153368691 has 4 divisors (see below), whose sum is σ = 2153532192. Its totient is φ = 2153205192.

The previous prime is 2153368643. The next prime is 2153368709. The reversal of 2153368691 is 1968633512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2153368691 - 2⁶ = 2153368627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153368601) 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, 60080 + ... + 88973.

It is an arithmetic number, because the mean of its divisors is an integer number (538383048).

Almost surely, 2^2153368691 is an apocalyptic number.

2153368691 is a deficient number, since it is larger than the sum of its proper divisors (163501).

2153368691 is a wasteful number, since it uses less digits than its factorization.

2153368691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163500.

The product of its digits is 233280, while the sum is 44.

The square root of 2153368691 is about 46404.4037888647. The cubic root of 2153368691 is about 1291.3366133287.

The spelling of 2153368691 in words is "two billion, one hundred fifty-three million, three hundred sixty-eight thousand, six hundred ninety-one".