136154358081 has 45 divisors (see below), whose sum is σ = 236638187379. Its totient is φ = 77789206656.

The previous prime is 136154358071. The next prime is 136154358107. The reversal of 136154358081 is 180853451631.

The square root of 136154358081 is 368991.

It is a perfect power (a square), and thus also a powerful number.

136154358081 is a `hidden beast` number, since 1 + 3 + 61 + 5 + 4 + 3 + 580 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128726676225 + 7427681856 = 358785^2 + 86184^2 .

It is not a de Polignac number, because 136154358081 - 2⁵ = 136154358049 is a prime.

It is a super-2 number, since 2×136154358081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136154358001) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 23243505 + ... + 23249361.

Almost surely, 2^136154358081 is an apocalyptic number.

136154358081 is the 368991-st square number.

136154358081 is the 184496-th centered octagonal number.

It is an amenable number.

136154358081 is a deficient number, since it is larger than the sum of its proper divisors (100483829298).

136154358081 is an frugal number, since it uses more digits than its factorization.

136154358081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11740 (or 5867 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 136154358081 in words is "one hundred thirty-six billion, one hundred fifty-four million, three hundred fifty-eight thousand, eighty-one".