136172603631 has 4 divisors (see below), whose sum is σ = 181563471512. Its totient is φ = 90781735752.

The previous prime is 136172603621. The next prime is 136172603659. The reversal of 136172603631 is 136306271631.

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

It is not a de Polignac number, because 136172603631 - 2³⁵ = 101812865263 is a prime.

It is a super-2 number, since 2×136172603631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136172603631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136172603621) 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, 22695433936 + ... + 22695433941.

It is an arithmetic number, because the mean of its divisors is an integer number (45390867878).

Almost surely, 2^136172603631 is an apocalyptic number.

136172603631 is a deficient number, since it is larger than the sum of its proper divisors (45390867881).

136172603631 is an equidigital number, since it uses as much as digits as its factorization.

136172603631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45390867880.

The product of its (nonzero) digits is 81648, while the sum is 39.

The spelling of 136172603631 in words is "one hundred thirty-six billion, one hundred seventy-two million, six hundred three thousand, six hundred thirty-one".