166851505635136 has 84 divisors (see below), whose sum is σ = 385943310151968. Its totient is φ = 71360954235648.

The previous prime is 166851505635119. The next prime is 166851505635167. The reversal of 166851505635136 is 631536505158661.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53098230 + ... + 56152693.

Almost surely, 2^{166851505635136} is an apocalyptic number.

166851505635136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166851505635136 is an abundant number, since it is smaller than the sum of its proper divisors (219091804516832).

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

166851505635136 is a wasteful number, since it uses less digits than its factorization.

166851505635136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109251436 (or 109251419 counting only the distinct ones).

The product of its (nonzero) digits is 58320000, while the sum is 61.

The spelling of 166851505635136 in words is "one hundred sixty-six trillion, eight hundred fifty-one billion, five hundred five million, six hundred thirty-five thousand, one hundred thirty-six".