12642057877 has 4 divisors (see below), whose sum is σ = 12830745376. Its totient is φ = 12453370380.

The previous prime is 12642057851. The next prime is 12642057907. The reversal of 12642057877 is 77875024621.

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 not a de Polignac number, because 12642057877 - 2³¹ = 10494574229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12642057877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642057677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94343649 + ... + 94343782.

It is an arithmetic number, because the mean of its divisors is an integer number (3207686344).

Almost surely, 2^12642057877 is an apocalyptic number.

It is an amenable number.

12642057877 is a deficient number, since it is larger than the sum of its proper divisors (188687499).

12642057877 is an equidigital number, since it uses as much as digits as its factorization.

12642057877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188687498.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 12642057877 in words is "twelve billion, six hundred forty-two million, fifty-seven thousand, eight hundred seventy-seven".