12975144385 has 48 divisors (see below), whose sum is σ = 18757652112. Its totient is φ = 8585740800.

The previous prime is 12975144367. The next prime is 12975144389. The reversal of 12975144385 is 58344157921.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4699239601 + 8275904784 = 68551^2 + 90972^2 .

It is not a de Polignac number, because 12975144385 - 2⁹ = 12975143873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12975144389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 783895 + ... + 800275.

It is an arithmetic number, because the mean of its divisors is an integer number (390784419).

Almost surely, 2^12975144385 is an apocalyptic number.

It is an amenable number.

12975144385 is a deficient number, since it is larger than the sum of its proper divisors (5782507727).

12975144385 is a wasteful number, since it uses less digits than its factorization.

12975144385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16514 (or 16507 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The spelling of 12975144385 in words is "twelve billion, nine hundred seventy-five million, one hundred forty-four thousand, three hundred eighty-five".