2158133942891 has 2 divisors, whose sum is σ = 2158133942892. Its totient is φ = 2158133942890.

The previous prime is 2158133942831. The next prime is 2158133942893. The reversal of 2158133942891 is 1982493318512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2158133942891 - 2²² = 2158129748587 is a prime.

Together with 2158133942893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2158133942893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079066971445 + 1079066971446.

It is an arithmetic number, because the mean of its divisors is an integer number (1079066971446).

Almost surely, 2^{2158133942891} is an apocalyptic number.

2158133942891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158133942891 is an equidigital number, since it uses as much as digits as its factorization.

2158133942891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The spelling of 2158133942891 in words is "two trillion, one hundred fifty-eight billion, one hundred thirty-three million, nine hundred forty-two thousand, eight hundred ninety-one".