12642156646 has 8 divisors (see below), whose sum is σ = 21672268560. Its totient is φ = 5418067128.

The previous prime is 12642156629. The next prime is 12642156677. The reversal of 12642156646 is 64665124621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451505581 + ... + 451505608.

It is an arithmetic number, because the mean of its divisors is an integer number (2709033570).

Almost surely, 2^12642156646 is an apocalyptic number.

12642156646 is a deficient number, since it is larger than the sum of its proper divisors (9030111914).

12642156646 is an equidigital number, since it uses as much as digits as its factorization.

12642156646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903011198.

The product of its digits is 414720, while the sum is 43.

The spelling of 12642156646 in words is "twelve billion, six hundred forty-two million, one hundred fifty-six thousand, six hundred forty-six".