15981265382 has 8 divisors (see below), whose sum is σ = 24020722152. Its totient is φ = 7974358000.

The previous prime is 15981265309. The next prime is 15981265403. The reversal of 15981265382 is 28356218951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15981265382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8136119 + ... + 8138082.

It is an arithmetic number, because the mean of its divisors is an integer number (3002590269).

Almost surely, 2^15981265382 is an apocalyptic number.

15981265382 is a deficient number, since it is larger than the sum of its proper divisors (8039456770).

15981265382 is a wasteful number, since it uses less digits than its factorization.

15981265382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16274694.

The product of its digits is 1036800, while the sum is 50.

The spelling of 15981265382 in words is "fifteen billion, nine hundred eighty-one million, two hundred sixty-five thousand, three hundred eighty-two".