12702372409 has 4 divisors (see below), whose sum is σ = 13449570804. Its totient is φ = 11955174016.

The previous prime is 12702372379. The next prime is 12702372413. The reversal of 12702372409 is 90427320721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11449000000 + 1253372409 = 107000^2 + 35403^2 .

It is a cyclic number.

It is not a de Polignac number, because 12702372409 - 2⁷ = 12702372281 is a prime.

It is a super-2 number, since 2×12702372409² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12702372469) 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, 373599172 + ... + 373599205.

It is an arithmetic number, because the mean of its divisors is an integer number (3362392701).

Almost surely, 2^12702372409 is an apocalyptic number.

It is an amenable number.

12702372409 is a deficient number, since it is larger than the sum of its proper divisors (747198395).

12702372409 is an equidigital number, since it uses as much as digits as its factorization.

12702372409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747198394.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 12702372409 in words is "twelve billion, seven hundred two million, three hundred seventy-two thousand, four hundred nine".