16857231408 has 50 divisors (see below), whose sum is σ = 48789722124. Its totient is φ = 5619076704.

The previous prime is 16857231403. The next prime is 16857231437. The reversal of 16857231408 is 80413275861.

16857231408 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 7 + 231 + 408 = 666.

It is not an unprimeable number, because it can be changed into a prime (16857231403) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6502266 + ... + 6504857.

Almost surely, 2^16857231408 is an apocalyptic number.

16857231408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16857231408 is an abundant number, since it is smaller than the sum of its proper divisors (31932490716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16857231408 is a wasteful number, since it uses less digits than its factorization.

16857231408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13007143 (or 13007128 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 16857231408 in words is "sixteen billion, eight hundred fifty-seven million, two hundred thirty-one thousand, four hundred eight".