99656789149 has 2 divisors, whose sum is σ = 99656789150. Its totient is φ = 99656789148.

The previous prime is 99656789147. The next prime is 99656789153. The reversal of 99656789149 is 94198765699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53670988900 + 45985800249 = 231670^2 + 214443^2 .

It is a cyclic number.

It is not a de Polignac number, because 99656789149 - 2¹ = 99656789147 is a prime.

Together with 99656789147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99656789143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49828394574 + 49828394575.

It is an arithmetic number, because the mean of its divisors is an integer number (49828394575).

Almost surely, 2^99656789149 is an apocalyptic number.

It is an amenable number.

99656789149 is a deficient number, since it is larger than the sum of its proper divisors (1).

99656789149 is an equidigital number, since it uses as much as digits as its factorization.

99656789149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264539520, while the sum is 73.

The spelling of 99656789149 in words is "ninety-nine billion, six hundred fifty-six million, seven hundred eighty-nine thousand, one hundred forty-nine".