12001956677 has 2 divisors, whose sum is σ = 12001956678. Its totient is φ = 12001956676.

The previous prime is 12001956671. The next prime is 12001956697. The reversal of 12001956677 is 77665910021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11812646596 + 189310081 = 108686^2 + 13759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001956677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001956671) 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 as a sum of consecutive naturals, namely, 6000978338 + 6000978339.

It is an arithmetic number, because the mean of its divisors is an integer number (6000978339).

Almost surely, 2^12001956677 is an apocalyptic number.

It is an amenable number.

12001956677 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001956677 is an equidigital number, since it uses as much as digits as its factorization.

12001956677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 12001956677 in words is "twelve billion, one million, nine hundred fifty-six thousand, six hundred seventy-seven".