136407841621 has 2 divisors, whose sum is σ = 136407841622. Its totient is φ = 136407841620.

The previous prime is 136407841613. The next prime is 136407841627. The reversal of 136407841621 is 126148704631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108989118225 + 27418723396 = 330135^2 + 165586^2 .

It is a cyclic number.

It is not a de Polignac number, because 136407841621 - 2³ = 136407841613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136407841627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68203920810 + 68203920811.

It is an arithmetic number, because the mean of its divisors is an integer number (68203920811).

Almost surely, 2^136407841621 is an apocalyptic number.

It is an amenable number.

136407841621 is a deficient number, since it is larger than the sum of its proper divisors (1).

136407841621 is an equidigital number, since it uses as much as digits as its factorization.

136407841621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 136407841621 in words is "one hundred thirty-six billion, four hundred seven million, eight hundred forty-one thousand, six hundred twenty-one".