99859390672 has 20 divisors (see below), whose sum is σ = 193857698340. Its totient is φ = 49831597568.

The previous prime is 99859390649. The next prime is 99859390679. The reversal of 99859390672 is 27609395899.

It can be written as a sum of positive squares in 2 ways, for example, as 30277392016 + 69581998656 = 174004^2 + 263784^2 .

It is a super-3 number, since 3×99859390672³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 99859390598 and 99859390607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99859390679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6122713 + ... + 6139000.

It is an arithmetic number, because the mean of its divisors is an integer number (9692884917).

Almost surely, 2^99859390672 is an apocalyptic number.

It is an amenable number.

99859390672 is a deficient number, since it is larger than the sum of its proper divisors (93998307668).

99859390672 is a wasteful number, since it uses less digits than its factorization.

99859390672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12262230 (or 12262224 counting only the distinct ones).

The product of its (nonzero) digits is 66134880, while the sum is 67.

The spelling of 99859390672 in words is "ninety-nine billion, eight hundred fifty-nine million, three hundred ninety thousand, six hundred seventy-two".