99859390671 has 8 divisors (see below), whose sum is σ = 133154675200. Its totient is φ = 66568516632.

The previous prime is 99859390649. The next prime is 99859390679. The reversal of 99859390671 is 17609395899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99859390671 - 2⁵ = 99859390639 is a prime.

It is a Duffinian number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1049425 + ... + 1140618.

It is an arithmetic number, because the mean of its divisors is an integer number (16644334400).

Almost surely, 2^99859390671 is an apocalyptic number.

99859390671 is a deficient number, since it is larger than the sum of its proper divisors (33295284529).

99859390671 is a wasteful number, since it uses less digits than its factorization.

99859390671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205245.

The product of its (nonzero) digits is 33067440, while the sum is 66.

The spelling of 99859390671 in words is "ninety-nine billion, eight hundred fifty-nine million, three hundred ninety thousand, six hundred seventy-one".