2145156234491 has 2 divisors, whose sum is σ = 2145156234492. Its totient is φ = 2145156234490.

The previous prime is 2145156234469. The next prime is 2145156234493. The reversal of 2145156234491 is 1944326515412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2145156234491 - 2³⁰ = 2144082492667 is a prime.

Together with 2145156234493, 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 (2145156234493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072578117245 + 1072578117246.

It is an arithmetic number, because the mean of its divisors is an integer number (1072578117246).

Almost surely, 2^{2145156234491} is an apocalyptic number.

2145156234491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145156234491 is an equidigital number, since it uses as much as digits as its factorization.

2145156234491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The spelling of 2145156234491 in words is "two trillion, one hundred forty-five billion, one hundred fifty-six million, two hundred thirty-four thousand, four hundred ninety-one".