136346643631 has 4 divisors (see below), whose sum is σ = 148741793064. Its totient is φ = 123951494200.

The previous prime is 136346643607. The next prime is 136346643659.

136346643631 is nontrivially palindromic in base 10.

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 136346643631 - 2⁹ = 136346643119 is a prime.

It is a super-2 number, since 2×136346643631² (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 (136346643661) 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, 6197574700 + ... + 6197574721.

It is an arithmetic number, because the mean of its divisors is an integer number (37185448266).

Almost surely, 2^136346643631 is an apocalyptic number.

136346643631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

136346643631 is a deficient number, since it is larger than the sum of its proper divisors (12395149433).

136346643631 is a wasteful number, since it uses less digits than its factorization.

136346643631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12395149432.

The product of its digits is 1679616, while the sum is 46.

It can be divided in two parts, 136346 and 643631, that added together give a palindrome (779977).

The spelling of 136346643631 in words is "one hundred thirty-six billion, three hundred forty-six million, six hundred forty-three thousand, six hundred thirty-one".