12538122493 has 16 divisors (see below), whose sum is σ = 13576635072. Its totient is φ = 11510352000.

The previous prime is 12538122491. The next prime is 12538122539. The reversal of 12538122493 is 39422183521.

It is a cyclic number.

It is not a de Polignac number, because 12538122493 - 2¹ = 12538122491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12538122491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2082858 + ... + 2088868.

It is an arithmetic number, because the mean of its divisors is an integer number (848539692).

Almost surely, 2^12538122493 is an apocalyptic number.

12538122493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12538122493 is a deficient number, since it is larger than the sum of its proper divisors (1038512579).

12538122493 is a wasteful number, since it uses less digits than its factorization.

12538122493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6876.

The product of its digits is 103680, while the sum is 40.

The spelling of 12538122493 in words is "twelve billion, five hundred thirty-eight million, one hundred twenty-two thousand, four hundred ninety-three".