15131635994356 has 144 divisors (see below), whose sum is σ = 31491633600000. Its totient is φ = 6341412310464.

The previous prime is 15131635994317. The next prime is 15131635994411. The reversal of 15131635994356 is 65349953613151.

It is a junction number, because it is equal to n+sod(n) for n = 15131635994294 and 15131635994303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1739464095 + ... + 1739472793.

It is an arithmetic number, because the mean of its divisors is an integer number (218691900000).

Almost surely, 2^{15131635994356} 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 15131635994356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15745816800000).

15131635994356 is an abundant number, since it is smaller than the sum of its proper divisors (16359997605644).

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

15131635994356 is a wasteful number, since it uses less digits than its factorization.

15131635994356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554 (or 9545 counting only the distinct ones).

The product of its digits is 39366000, while the sum is 61.

The spelling of 15131635994356 in words is "fifteen trillion, one hundred thirty-one billion, six hundred thirty-five million, nine hundred ninety-four thousand, three hundred fifty-six".