15799738781 has 8 divisors (see below), whose sum is σ = 16632533280. Its totient is φ = 14967067248.

The previous prime is 15799738769. The next prime is 15799738837. The reversal of 15799738781 is 18783799751.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15799738781 is a prime.

It is a super-2 number, since 2×15799738781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15799738741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361355 + ... + 402711.

It is an arithmetic number, because the mean of its divisors is an integer number (2079066660).

Almost surely, 2^15799738781 is an apocalyptic number.

It is an amenable number.

15799738781 is a deficient number, since it is larger than the sum of its proper divisors (832794499).

15799738781 is a wasteful number, since it uses less digits than its factorization.

15799738781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61483.

The product of its digits is 26671680, while the sum is 65.

The spelling of 15799738781 in words is "fifteen billion, seven hundred ninety-nine million, seven hundred thirty-eight thousand, seven hundred eighty-one".