16363964989991 has 2 divisors, whose sum is σ = 16363964989992. Its totient is φ = 16363964989990.

The previous prime is 16363964989969. The next prime is 16363964990053. The reversal of 16363964989991 is 19998946936361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16363964989991 - 2⁶ = 16363964989927 is a prime.

It is a super-2 number, since 2×16363964989991² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16363966989991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8181982494995 + 8181982494996.

It is an arithmetic number, because the mean of its divisors is an integer number (8181982494996).

Almost surely, 2^{16363964989991} is an apocalyptic number.

16363964989991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16363964989991 is an equidigital number, since it uses as much as digits as its factorization.

16363964989991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3673320192, while the sum is 83.

The spelling of 16363964989991 in words is "sixteen trillion, three hundred sixty-three billion, nine hundred sixty-four million, nine hundred eighty-nine thousand, nine hundred ninety-one".