136536457 has 4 divisors (see below), whose sum is σ = 139441536. Its totient is φ = 133631380.

The previous prime is 136536409. The next prime is 136536473. The reversal of 136536457 is 754635631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136536457 - 2²³ = 128147849 is a prime.

It is a super-2 number, since 2×136536457² = 37284408180225698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136536157) 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, 1452469 + ... + 1452562.

It is an arithmetic number, because the mean of its divisors is an integer number (34860384).

Almost surely, 2^136536457 is an apocalyptic number.

It is an amenable number.

136536457 is a deficient number, since it is larger than the sum of its proper divisors (2905079).

136536457 is an equidigital number, since it uses as much as digits as its factorization.

136536457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905078.

The product of its digits is 226800, while the sum is 40.

The square root of 136536457 is about 11684.8815569521. The cubic root of 136536457 is about 514.9315986699.

The spelling of 136536457 in words is "one hundred thirty-six million, five hundred thirty-six thousand, four hundred fifty-seven".