9999857093407 has 4 divisors (see below), whose sum is σ = 10212620010336. Its totient is φ = 9787094176480.

The previous prime is 9999857093333. The next prime is 9999857093419. The reversal of 9999857093407 is 7043907589999.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999857093407 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 (9999857093437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106381458394 + ... + 106381458487.

It is an arithmetic number, because the mean of its divisors is an integer number (2553155002584).

Almost surely, 2^{9999857093407} is an apocalyptic number.

9999857093407 is a deficient number, since it is larger than the sum of its proper divisors (212762916929).

9999857093407 is a wasteful number, since it uses less digits than its factorization.

9999857093407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212762916928.

The product of its (nonzero) digits is 1388832480, while the sum is 79.

The spelling of 9999857093407 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred fifty-seven million, ninety-three thousand, four hundred seven".