99428636097 has 12 divisors (see below), whose sum is σ = 164136161280. Its totient is φ = 56816363448.

The previous prime is 99428636093. The next prime is 99428636107. The reversal of 99428636097 is 79063682499.

99428636097 is a `hidden beast` number, since 9 + 9 + 428 + 63 + 60 + 97 = 666.

It is not a de Polignac number, because 99428636097 - 2² = 99428636093 is a prime.

It is a super-2 number, since 2×99428636097² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 1578232319 = 99428636097 / (9 + 9 + 4 + 2 + 8 + 6 + 3 + 6 + 0 + 9 + 7).

It is not an unprimeable number, because it can be changed into a prime (99428636093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 789116097 + ... + 789116222.

It is an arithmetic number, because the mean of its divisors is an integer number (13678013440).

Almost surely, 2^99428636097 is an apocalyptic number.

It is an amenable number.

99428636097 is a deficient number, since it is larger than the sum of its proper divisors (64707525183).

99428636097 is a wasteful number, since it uses less digits than its factorization.

99428636097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578232332 (or 1578232329 counting only the distinct ones).

The product of its (nonzero) digits is 35271936, while the sum is 63.

The spelling of 99428636097 in words is "ninety-nine billion, four hundred twenty-eight million, six hundred thirty-six thousand, ninety-seven".