15691115142 has 24 divisors (see below), whose sum is σ = 34113459744. Its totient is φ = 5212518864.

The previous prime is 15691115137. The next prime is 15691115171. The reversal of 15691115142 is 24151119651.

It is a happy number.

15691115142 is a `hidden beast` number, since 1 + 56 + 91 + 1 + 1 + 514 + 2 = 666.

15691115142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15691115142² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15691115097 and 15691115106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1482318 + ... + 1492865.

It is an arithmetic number, because the mean of its divisors is an integer number (1421394156).

Almost surely, 2^15691115142 is an apocalyptic number.

15691115142 is an abundant number, since it is smaller than the sum of its proper divisors (18422344602).

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

15691115142 is a wasteful number, since it uses less digits than its factorization.

15691115142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975484 (or 2975481 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The spelling of 15691115142 in words is "fifteen billion, six hundred ninety-one million, one hundred fifteen thousand, one hundred forty-two".