136214561491 has 2 divisors, whose sum is σ = 136214561492. Its totient is φ = 136214561490.

The previous prime is 136214561489. The next prime is 136214561501. The reversal of 136214561491 is 194165412631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136214561491 - 2¹ = 136214561489 is a prime.

Together with 136214561489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136214567491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68107280745 + 68107280746.

It is an arithmetic number, because the mean of its divisors is an integer number (68107280746).

Almost surely, 2^136214561491 is an apocalyptic number.

136214561491 is a deficient number, since it is larger than the sum of its proper divisors (1).

136214561491 is an equidigital number, since it uses as much as digits as its factorization.

136214561491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The spelling of 136214561491 in words is "one hundred thirty-six billion, two hundred fourteen million, five hundred sixty-one thousand, four hundred ninety-one".