99651815699 has 2 divisors, whose sum is σ = 99651815700. Its totient is φ = 99651815698.

The previous prime is 99651815693. The next prime is 99651815701.

99651815699 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99651815699 is a prime.

Together with 99651815701, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99651815693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49825907849 + 49825907850.

It is an arithmetic number, because the mean of its divisors is an integer number (49825907850).

Almost surely, 2^99651815699 is an apocalyptic number.

99651815699 is a deficient number, since it is larger than the sum of its proper divisors (1).

99651815699 is an equidigital number, since it uses as much as digits as its factorization.

99651815699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47239200, while the sum is 68.

The spelling of 99651815699 in words is "ninety-nine billion, six hundred fifty-one million, eight hundred fifteen thousand, six hundred ninety-nine".