12690134579 has 4 divisors (see below), whose sum is σ = 12717903384. Its totient is φ = 12662365776.

The previous prime is 12690134537. The next prime is 12690134591. The reversal of 12690134579 is 97543109621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97543109621 = 457 ⋅213442253.

It is a cyclic number.

It is not a de Polignac number, because 12690134579 - 2⁸ = 12690134323 is a prime.

It is a super-2 number, since 2×12690134579² (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 (12690134179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13883717 + ... + 13884630.

It is an arithmetic number, because the mean of its divisors is an integer number (3179475846).

Almost surely, 2^12690134579 is an apocalyptic number.

12690134579 is a deficient number, since it is larger than the sum of its proper divisors (27768805).

12690134579 is an equidigital number, since it uses as much as digits as its factorization.

12690134579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27768804.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 12690134579 in words is "twelve billion, six hundred ninety million, one hundred thirty-four thousand, five hundred seventy-nine".