99985158999 has 40 divisors (see below), whose sum is σ = 163469970048. Its totient is φ = 60399516240.

The previous prime is 99985158947. The next prime is 99985159003.

It is a happy number.

99985158999 is a `hidden beast` number, since 9 + 9 + 9 + 8 + 515 + 8 + 9 + 99 = 666.

99985158999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99985158999 - 2¹² = 99985154903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99985158799) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 90774 + ... + 456300.

Almost surely, 2^99985158999 is an apocalyptic number.

99985158999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99985158999 is a deficient number, since it is larger than the sum of its proper divisors (63484811049).

99985158999 is a wasteful number, since it uses less digits than its factorization.

99985158999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365857 (or 365848 counting only the distinct ones).

The product of its digits is 850305600, while the sum is 81.

The spelling of 99985158999 in words is "ninety-nine billion, nine hundred eighty-five million, one hundred fifty-eight thousand, nine hundred ninety-nine".