12689962541 has 4 divisors (see below), whose sum is σ = 12959961792. Its totient is φ = 12419963292.

The previous prime is 12689962517. The next prime is 12689962577. The reversal of 12689962541 is 14526998621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12689962541 is a prime.

It is a super-2 number, since 2×12689962541² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12689962591) 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, 134999555 + ... + 134999648.

It is an arithmetic number, because the mean of its divisors is an integer number (3239990448).

Almost surely, 2^12689962541 is an apocalyptic number.

It is an amenable number.

12689962541 is a deficient number, since it is larger than the sum of its proper divisors (269999251).

12689962541 is an equidigital number, since it uses as much as digits as its factorization.

12689962541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269999250.

The product of its digits is 1866240, while the sum is 53.

The spelling of 12689962541 in words is "twelve billion, six hundred eighty-nine million, nine hundred sixty-two thousand, five hundred forty-one".