12688894045 has 8 divisors (see below), whose sum is σ = 15305568696. Its totient is φ = 10098518016.

The previous prime is 12688894039. The next prime is 12688894063. The reversal of 12688894045 is 54049888621.

It can be written as a sum of positive squares in 4 ways, for example, as 3602404 + 12685291641 = 1898^2 + 112629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12688894045 - 2⁹ = 12688893533 is a prime.

It is a super-2 number, since 2×12688894045² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6573592 + ... + 6575521.

It is an arithmetic number, because the mean of its divisors is an integer number (1913196087).

Almost surely, 2^12688894045 is an apocalyptic number.

It is an amenable number.

12688894045 is a deficient number, since it is larger than the sum of its proper divisors (2616674651).

12688894045 is a wasteful number, since it uses less digits than its factorization.

12688894045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13149311.

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 12688894045 in words is "twelve billion, six hundred eighty-eight million, eight hundred ninety-four thousand, forty-five".