2164636123987 has 2 divisors, whose sum is σ = 2164636123988. Its totient is φ = 2164636123986.

The previous prime is 2164636123973. The next prime is 2164636124009. The reversal of 2164636123987 is 7893216364612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2164636123987 - 2³¹ = 2162488640339 is a prime.

It is not a weakly prime, because it can be changed into another prime (2164636123907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082318061993 + 1082318061994.

It is an arithmetic number, because the mean of its divisors is an integer number (1082318061994).

Almost surely, 2^{2164636123987} is an apocalyptic number.

2164636123987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2164636123987 is an equidigital number, since it uses as much as digits as its factorization.

2164636123987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 58.

The spelling of 2164636123987 in words is "two trillion, one hundred sixty-four billion, six hundred thirty-six million, one hundred twenty-three thousand, nine hundred eighty-seven".