136013459921 has 2 divisors, whose sum is σ = 136013459922. Its totient is φ = 136013459920.

The previous prime is 136013459891. The next prime is 136013459927. The reversal of 136013459921 is 129954310631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68468048896 + 67545411025 = 261664^2 + 259895^2 .

It is a cyclic number.

It is not a de Polignac number, because 136013459921 - 2²² = 136009265617 is a prime.

It is a super-2 number, since 2×136013459921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136013459927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68006729960 + 68006729961.

It is an arithmetic number, because the mean of its divisors is an integer number (68006729961).

Almost surely, 2^136013459921 is an apocalyptic number.

It is an amenable number.

136013459921 is a deficient number, since it is larger than the sum of its proper divisors (1).

136013459921 is an equidigital number, since it uses as much as digits as its factorization.

136013459921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 136013459921 in words is "one hundred thirty-six billion, thirteen million, four hundred fifty-nine thousand, nine hundred twenty-one".