16231171381857 has 36 divisors (see below), whose sum is σ = 24659055038800. Its totient is φ = 10286812845936.

The previous prime is 16231171381853. The next prime is 16231171381861. The reversal of 16231171381857 is 75818317113261.

16231171381857 is a `hidden beast` number, since 1 + 62 + 31 + 171 + 381 + 8 + 5 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (16231171381853) and next prime (16231171381861).

It is not a de Polignac number, because 16231171381857 - 2² = 16231171381853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16231171381853) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9681607 + ... + 11233692.

Almost surely, 2^{16231171381857} is an apocalyptic number.

It is an amenable number.

16231171381857 is a deficient number, since it is larger than the sum of its proper divisors (8427883656943).

16231171381857 is a wasteful number, since it uses less digits than its factorization.

16231171381857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20915514 (or 20915488 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The spelling of 16231171381857 in words is "sixteen trillion, two hundred thirty-one billion, one hundred seventy-one million, three hundred eighty-one thousand, eight hundred fifty-seven".