16634249987 has 2 divisors, whose sum is σ = 16634249988. Its totient is φ = 16634249986.

The previous prime is 16634249953. The next prime is 16634250007. The reversal of 16634249987 is 78994243661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16634249987 - 2⁶ = 16634249923 is a prime.

It is not a weakly prime, because it can be changed into another prime (16634249087) 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, 8317124993 + 8317124994.

It is an arithmetic number, because the mean of its divisors is an integer number (8317124994).

Almost surely, 2^16634249987 is an apocalyptic number.

16634249987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16634249987 is an equidigital number, since it uses as much as digits as its factorization.

16634249987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 59.

The spelling of 16634249987 in words is "sixteen billion, six hundred thirty-four million, two hundred forty-nine thousand, nine hundred eighty-seven".