12689339799506 has 4 divisors (see below), whose sum is σ = 19034009699262. Its totient is φ = 6344669899752.

The previous prime is 12689339799473. The next prime is 12689339799559. The reversal of 12689339799506 is 60599793398621.

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

It can be written as a sum of positive squares in only one way, i.e., 11249711775481 + 1439628024025 = 3354059^2 + 1199845^2 .

It is a super-2 number, since 2×12689339799506² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3172334949875 + ... + 3172334949878.

Almost surely, 2^{12689339799506} is an apocalyptic number.

12689339799506 is a deficient number, since it is larger than the sum of its proper divisors (6344669899756).

12689339799506 is an equidigital number, since it uses as much as digits as its factorization.

12689339799506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6344669899755.

The product of its (nonzero) digits is 1190427840, while the sum is 77.

The spelling of 12689339799506 in words is "twelve trillion, six hundred eighty-nine billion, three hundred thirty-nine million, seven hundred ninety-nine thousand, five hundred six".