16857231407 has 4 divisors (see below), whose sum is σ = 17006410560. Its totient is φ = 16708052256.

The previous prime is 16857231403. The next prime is 16857231437. The reversal of 16857231407 is 70413275861.

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

It is a cyclic number.

It is not a de Polignac number, because 16857231407 - 2² = 16857231403 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 (16857231403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74589407 + ... + 74589632.

It is an arithmetic number, because the mean of its divisors is an integer number (4251602640).

Almost surely, 2^16857231407 is an apocalyptic number.

16857231407 is a deficient number, since it is larger than the sum of its proper divisors (149179153).

16857231407 is a wasteful number, since it uses less digits than its factorization.

16857231407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149179152.

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 16857231407 in words is "sixteen billion, eight hundred fifty-seven million, two hundred thirty-one thousand, four hundred seven".