216170164540 has 48 divisors (see below), whose sum is σ = 495353779200. Its totient is φ = 78587081280.

The previous prime is 216170164531. The next prime is 216170164583. The reversal of 216170164540 is 45461071612.

It is a self number, because there is not a number n which added to its sum of digits gives 216170164540.

It is a congruent number.

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, 742861 + ... + 992059.

It is an arithmetic number, because the mean of its divisors is an integer number (10319870400).

Almost surely, 2^216170164540 is an apocalyptic number.

216170164540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216170164540 is an abundant number, since it is smaller than the sum of its proper divisors (279183614660).

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

216170164540 is a wasteful number, since it uses less digits than its factorization.

216170164540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253162 (or 253160 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 216170164540 in words is "two hundred sixteen billion, one hundred seventy million, one hundred sixty-four thousand, five hundred forty".