15823379985 has 16 divisors (see below), whose sum is σ = 28934180736. Its totient is φ = 7233545088.

The previous prime is 15823379981. The next prime is 15823380049. The reversal of 15823379985 is 58997332851.

It is not a de Polignac number, because 15823379985 - 2² = 15823379981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15823379981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75349324 + ... + 75349533.

It is an arithmetic number, because the mean of its divisors is an integer number (1808386296).

Almost surely, 2^15823379985 is an apocalyptic number.

15823379985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15823379985 is a deficient number, since it is larger than the sum of its proper divisors (13110800751).

15823379985 is a wasteful number, since it uses less digits than its factorization.

15823379985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150698872.

The product of its digits is 16329600, while the sum is 60.

The spelling of 15823379985 in words is "fifteen billion, eight hundred twenty-three million, three hundred seventy-nine thousand, nine hundred eighty-five".