15963799523 has 24 divisors (see below), whose sum is σ = 18979861824. Its totient is φ = 13381804800.

The previous prime is 15963799471. The next prime is 15963799547. The reversal of 15963799523 is 32599736951.

It is not a de Polignac number, because 15963799523 - 2¹² = 15963795427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15963799573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5113403 + ... + 5116523.

It is an arithmetic number, because the mean of its divisors is an integer number (790827576).

Almost surely, 2^15963799523 is an apocalyptic number.

15963799523 is a deficient number, since it is larger than the sum of its proper divisors (3016062301).

15963799523 is a wasteful number, since it uses less digits than its factorization.

15963799523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5403 (or 5396 counting only the distinct ones).

The product of its digits is 13778100, while the sum is 59.

The spelling of 15963799523 in words is "fifteen billion, nine hundred sixty-three million, seven hundred ninety-nine thousand, five hundred twenty-three".