165355541616 has 40 divisors (see below), whose sum is σ = 437102638720. Its totient is φ = 53836687296.

The previous prime is 165355541597. The next prime is 165355541623. The reversal of 165355541616 is 616145553561.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40054996 + ... + 40059123.

It is an arithmetic number, because the mean of its divisors is an integer number (10927565968).

Almost surely, 2^165355541616 is an apocalyptic number.

165355541616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165355541616 is an abundant number, since it is smaller than the sum of its proper divisors (271747097104).

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

165355541616 is a wasteful number, since it uses less digits than its factorization.

165355541616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80114173 (or 80114167 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 48.

The spelling of 165355541616 in words is "one hundred sixty-five billion, three hundred fifty-five million, five hundred forty-one thousand, six hundred sixteen".