12985231623 has 24 divisors (see below), whose sum is σ = 21689620848. Its totient is φ = 6849351936.

The previous prime is 12985231621. The next prime is 12985231643. The reversal of 12985231623 is 32613258921.

It is not a de Polignac number, because 12985231623 - 2¹ = 12985231621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12985231621) 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, 3395586 + ... + 3399407.

It is an arithmetic number, because the mean of its divisors is an integer number (903734202).

Almost surely, 2^12985231623 is an apocalyptic number.

12985231623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12985231623 is a deficient number, since it is larger than the sum of its proper divisors (8704389225).

12985231623 is a wasteful number, since it uses less digits than its factorization.

12985231623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6795023 (or 6795016 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The spelling of 12985231623 in words is "twelve billion, nine hundred eighty-five million, two hundred thirty-one thousand, six hundred twenty-three".