12642051967 has 4 divisors (see below), whose sum is σ = 12672081016. Its totient is φ = 12612022920.

The previous prime is 12642051949. The next prime is 12642051973. The reversal of 12642051967 is 76915024621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12642051967 - 2⁷ = 12642051839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642051767) 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, 15013893 + ... + 15014734.

It is an arithmetic number, because the mean of its divisors is an integer number (3168020254).

Almost surely, 2^12642051967 is an apocalyptic number.

12642051967 is a deficient number, since it is larger than the sum of its proper divisors (30029049).

12642051967 is an equidigital number, since it uses as much as digits as its factorization.

12642051967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30029048.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 12642051967 in words is "twelve billion, six hundred forty-two million, fifty-one thousand, nine hundred sixty-seven".