16857242155 has 36 divisors (see below), whose sum is σ = 22634918640. Its totient is φ = 12046282560.

The previous prime is 16857242153. The next prime is 16857242167. The reversal of 16857242155 is 55124275861.

It is not a de Polignac number, because 16857242155 - 2¹ = 16857242153 is a prime.

It is a super-2 number, since 2×16857242155² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16857242153) 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, 801666 + ... + 822424.

It is an arithmetic number, because the mean of its divisors is an integer number (628747740).

Almost surely, 2^16857242155 is an apocalyptic number.

16857242155 is a deficient number, since it is larger than the sum of its proper divisors (5777676485).

16857242155 is a wasteful number, since it uses less digits than its factorization.

16857242155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20852 (or 20808 counting only the distinct ones).

The product of its digits is 672000, while the sum is 46.

The spelling of 16857242155 in words is "sixteen billion, eight hundred fifty-seven million, two hundred forty-two thousand, one hundred fifty-five".