165611803485 has 16 divisors (see below), whose sum is σ = 276499707264. Its totient is φ = 84486021312.

The previous prime is 165611803391. The next prime is 165611803529. The reversal of 165611803485 is 584308116561.

It is not a de Polignac number, because 165611803485 - 2⁹ = 165611802973 is a prime.

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, 240016762 + ... + 240017451.

It is an arithmetic number, because the mean of its divisors is an integer number (17281231704).

Almost surely, 2^165611803485 is an apocalyptic number.

165611803485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165611803485 is a deficient number, since it is larger than the sum of its proper divisors (110887903779).

165611803485 is a wasteful number, since it uses less digits than its factorization.

165611803485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480034244.

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 165611803485 in words is "one hundred sixty-five billion, six hundred eleven million, eight hundred three thousand, four hundred eighty-five".