16856634542235 has 16 divisors (see below), whose sum is σ = 27273655890720. Its totient is φ = 8889191548160.

The previous prime is 16856634542159. The next prime is 16856634542273. The reversal of 16856634542235 is 53224543665861.

It is not a de Polignac number, because 16856634542235 - 2¹³ = 16856634534043 is a prime.

It is a super-2 number, since 2×16856634542235² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6313344936 + ... + 6313347605.

It is an arithmetic number, because the mean of its divisors is an integer number (1704603493170).

Almost surely, 2^{16856634542235} is an apocalyptic number.

16856634542235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16856634542235 is a deficient number, since it is larger than the sum of its proper divisors (10417021348485).

16856634542235 is a wasteful number, since it uses less digits than its factorization.

16856634542235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12626692638.

The product of its digits is 124416000, while the sum is 60.

The spelling of 16856634542235 in words is "sixteen trillion, eight hundred fifty-six billion, six hundred thirty-four million, five hundred forty-two thousand, two hundred thirty-five".