99999534951 has 24 divisors (see below), whose sum is σ = 146941876224. Its totient is φ = 65523200400.

The previous prime is 99999534937. The next prime is 99999534953. The reversal of 99999534951 is 15943599999.

It is not a de Polignac number, because 99999534951 - 2¹⁷ = 99999403879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99999534951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999534953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286525 + ... + 531126.

It is an arithmetic number, because the mean of its divisors is an integer number (6122578176).

Almost surely, 2^99999534951 is an apocalyptic number.

99999534951 is a deficient number, since it is larger than the sum of its proper divisors (46942341273).

99999534951 is a wasteful number, since it uses less digits than its factorization.

99999534951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817891 (or 817888 counting only the distinct ones).

The product of its digits is 159432300, while the sum is 72.

The spelling of 99999534951 in words is "ninety-nine billion, nine hundred ninety-nine million, five hundred thirty-four thousand, nine hundred fifty-one".