99523790289 has 192 divisors, whose sum is σ = 192387686400. Its totient is φ = 50958149760.

The previous prime is 99523790281. The next prime is 99523790309. The reversal of 99523790289 is 98209732599.

It is not a de Polignac number, because 99523790289 - 2³ = 99523790281 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (99523790281) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 66928504 + ... + 66929990.

It is an arithmetic number, because the mean of its divisors is an integer number (1002019200).

Almost surely, 2^99523790289 is an apocalyptic number.

99523790289 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

99523790289 is a deficient number, since it is larger than the sum of its proper divisors (92863896111).

99523790289 is a wasteful number, since it uses less digits than its factorization.

99523790289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 63.

The spelling of 99523790289 in words is "ninety-nine billion, five hundred twenty-three million, seven hundred ninety thousand, two hundred eighty-nine".