136453516884721 has 2 divisors, whose sum is σ = 136453516884722. Its totient is φ = 136453516884720.

The previous prime is 136453516884649. The next prime is 136453516884731. The reversal of 136453516884721 is 127488615354631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130707452445696 + 5746064439025 = 11432736^2 + 2397095^2 .

It is a cyclic number.

It is not a de Polignac number, because 136453516884721 - 2²³ = 136453508496113 is a prime.

It is not a weakly prime, because it can be changed into another prime (136453516884731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68226758442360 + 68226758442361.

It is an arithmetic number, because the mean of its divisors is an integer number (68226758442361).

Almost surely, 2^{136453516884721} is an apocalyptic number.

It is an amenable number.

136453516884721 is a deficient number, since it is larger than the sum of its proper divisors (1).

136453516884721 is an equidigital number, since it uses as much as digits as its factorization.

136453516884721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116121600, while the sum is 64.

The spelling of 136453516884721 in words is "one hundred thirty-six trillion, four hundred fifty-three billion, five hundred sixteen million, eight hundred eighty-four thousand, seven hundred twenty-one".