136081511 has 4 divisors (see below), whose sum is σ = 137998224. Its totient is φ = 134164800.

The previous prime is 136081507. The next prime is 136081531. The reversal of 136081511 is 115180631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 115180631 = 1871 ⋅61561.

It is a cyclic number.

It is not a de Polignac number, because 136081511 - 2² = 136081507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136081531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 958250 + ... + 958391.

It is an arithmetic number, because the mean of its divisors is an integer number (34499556).

Almost surely, 2^136081511 is an apocalyptic number.

136081511 is a deficient number, since it is larger than the sum of its proper divisors (1916713).

136081511 is an equidigital number, since it uses as much as digits as its factorization.

136081511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916712.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 136081511 is about 11665.3980214993. The cubic root of 136081511 is about 514.3590366982.

The spelling of 136081511 in words is "one hundred thirty-six million, eighty-one thousand, five hundred eleven".