136431690459 has 4 divisors (see below), whose sum is σ = 181908920616. Its totient is φ = 90954460304.

The previous prime is 136431690449. The next prime is 136431690497. The reversal of 136431690459 is 954096134631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954096134631 = 3 ⋅318032044877.

It is a cyclic number.

It is not a de Polignac number, because 136431690459 - 2¹³ = 136431682267 is a prime.

It is a super-3 number, since 3×136431690459³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (136431690449) 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, 22738615074 + ... + 22738615079.

It is an arithmetic number, because the mean of its divisors is an integer number (45477230154).

Almost surely, 2^136431690459 is an apocalyptic number.

136431690459 is a deficient number, since it is larger than the sum of its proper divisors (45477230157).

136431690459 is an equidigital number, since it uses as much as digits as its factorization.

136431690459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45477230156.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 136431690459 in words is "one hundred thirty-six billion, four hundred thirty-one million, six hundred ninety thousand, four hundred fifty-nine".