136645232431 has 4 divisors (see below), whose sum is σ = 136761924664. Its totient is φ = 136528540200.

The previous prime is 136645232419. The next prime is 136645232483. The reversal of 136645232431 is 134232546631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136645232431 - 2⁷ = 136645232303 is a prime.

It is a super-2 number, since 2×136645232431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136645232401) 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, 58344360 + ... + 58346701.

It is an arithmetic number, because the mean of its divisors is an integer number (34190481166).

Almost surely, 2^136645232431 is an apocalyptic number.

136645232431 is a deficient number, since it is larger than the sum of its proper divisors (116692233).

136645232431 is a wasteful number, since it uses less digits than its factorization.

136645232431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116692232.

The product of its digits is 311040, while the sum is 40.

The spelling of 136645232431 in words is "one hundred thirty-six billion, six hundred forty-five million, two hundred thirty-two thousand, four hundred thirty-one".