15797489819 has 8 divisors (see below), whose sum is σ = 16727911200. Its totient is φ = 14867197056.

The previous prime is 15797489801. The next prime is 15797489843. The reversal of 15797489819 is 91898479751.

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

It is a cyclic number.

It is not a de Polignac number, because 15797489819 - 2¹⁶ = 15797424283 is a prime.

It is a super-2 number, since 2×15797489819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15797489879) 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, 351857 + ... + 394205.

It is an arithmetic number, because the mean of its divisors is an integer number (2090988900).

Almost surely, 2^15797489819 is an apocalyptic number.

15797489819 is a deficient number, since it is larger than the sum of its proper divisors (930421381).

15797489819 is a wasteful number, since it uses less digits than its factorization.

15797489819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64309.

The product of its digits is 45722880, while the sum is 68.

The spelling of 15797489819 in words is "fifteen billion, seven hundred ninety-seven million, four hundred eighty-nine thousand, eight hundred nineteen".