168538538835 has 32 divisors (see below), whose sum is σ = 300162127680. Its totient is φ = 89725803264.

The previous prime is 168538538807. The next prime is 168538538851. The reversal of 168538538835 is 538835835861.

168538538835 is a `hidden beast` number, since 1 + 68 + 5 + 3 + 8 + 538 + 8 + 35 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-168538538835 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1045482 + ... + 1195871.

It is an arithmetic number, because the mean of its divisors is an integer number (9380066490).

Almost surely, 2^168538538835 is an apocalyptic number.

168538538835 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

168538538835 is a deficient number, since it is larger than the sum of its proper divisors (131623588845).

168538538835 is a wasteful number, since it uses less digits than its factorization.

168538538835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241924 (or 2241918 counting only the distinct ones).

The product of its digits is 82944000, while the sum is 63.

The spelling of 168538538835 in words is "one hundred sixty-eight billion, five hundred thirty-eight million, five hundred thirty-eight thousand, eight hundred thirty-five".