12861402665 has 8 divisors (see below), whose sum is σ = 15506829888. Its totient is φ = 10240357680.

The previous prime is 12861402643. The next prime is 12861402739. The reversal of 12861402665 is 56620416821.

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

It is not a de Polignac number, because 12861402665 - 2⁶ = 12861402601 is a prime.

It is a super-2 number, since 2×12861402665² (a number of 21 digits) contains 22 as substring.

It is a Duffinian 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, 6094397 + ... + 6096506.

It is an arithmetic number, because the mean of its divisors is an integer number (1938353736).

Almost surely, 2^12861402665 is an apocalyptic number.

It is an amenable number.

12861402665 is a deficient number, since it is larger than the sum of its proper divisors (2645427223).

12861402665 is a wasteful number, since it uses less digits than its factorization.

12861402665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12191119.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 12861402665 in words is "twelve billion, eight hundred sixty-one million, four hundred two thousand, six hundred sixty-five".