15855696812 has 12 divisors (see below), whose sum is σ = 28016863056. Its totient is φ = 7850878800.

The previous prime is 15855696811. The next prime is 15855696853. The reversal of 15855696812 is 21869655851.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15855696811) 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, 19241939 + ... + 19242762.

It is an arithmetic number, because the mean of its divisors is an integer number (2334738588).

Almost surely, 2^15855696812 is an apocalyptic number.

It is an amenable number.

15855696812 is a deficient number, since it is larger than the sum of its proper divisors (12161166244).

15855696812 is a wasteful number, since it uses less digits than its factorization.

15855696812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38484808 (or 38484806 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 56.

The spelling of 15855696812 in words is "fifteen billion, eight hundred fifty-five million, six hundred ninety-six thousand, eight hundred twelve".