15981744892 has 12 divisors (see below), whose sum is σ = 29440056520. Its totient is φ = 7570300176.

The previous prime is 15981744851. The next prime is 15981744893. The reversal of 15981744892 is 29844718951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15981744893) 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, 105142983 + ... + 105143134.

Almost surely, 2^15981744892 is an apocalyptic number.

It is an amenable number.

15981744892 is a deficient number, since it is larger than the sum of its proper divisors (13458311628).

15981744892 is a wasteful number, since it uses less digits than its factorization.

15981744892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210286140 (or 210286138 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 58.

The spelling of 15981744892 in words is "fifteen billion, nine hundred eighty-one million, seven hundred forty-four thousand, eight hundred ninety-two".