12375661493 has 4 divisors (see below), whose sum is σ = 13327635468. Its totient is φ = 11423687520.

The previous prime is 12375661489. The next prime is 12375661499. The reversal of 12375661493 is 39416657321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39416657321 = 46307 ⋅851203.

It can be written as a sum of positive squares in 2 ways, for example, as 3666665809 + 8708995684 = 60553^2 + 93322^2 .

It is a cyclic number.

It is not a de Polignac number, because 12375661493 - 2² = 12375661489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12375661499) 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 3 ways as a sum of consecutive naturals, for example, 475986968 + ... + 475986993.

It is an arithmetic number, because the mean of its divisors is an integer number (3331908867).

Almost surely, 2^12375661493 is an apocalyptic number.

12375661493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12375661493 is a deficient number, since it is larger than the sum of its proper divisors (951973975).

12375661493 is an equidigital number, since it uses as much as digits as its factorization.

12375661493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951973974.

The product of its digits is 816480, while the sum is 47.

The spelling of 12375661493 in words is "twelve billion, three hundred seventy-five million, six hundred sixty-one thousand, four hundred ninety-three".