15731642136 has 128 divisors (see below), whose sum is σ = 45859737600. Its totient is φ = 4404449280.

The previous prime is 15731642119. The next prime is 15731642191. The reversal of 15731642136 is 63124613751.

It is a junction number, because it is equal to n+sod(n) for n = 15731642094 and 15731642103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1684921 + ... + 1694231.

It is an arithmetic number, because the mean of its divisors is an integer number (358279200).

Almost surely, 2^15731642136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15731642136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22929868800).

15731642136 is an abundant number, since it is smaller than the sum of its proper divisors (30128095464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15731642136 is a wasteful number, since it uses less digits than its factorization.

15731642136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529 (or 9525 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 15731642136 in words is "fifteen billion, seven hundred thirty-one million, six hundred forty-two thousand, one hundred thirty-six".