165500655006500 has 96 divisors (see below), whose sum is σ = 394321162435200. Its totient is φ = 60180785136000.

The previous prime is 165500655006451. The next prime is 165500655006503. The reversal of 165500655006500 is 5600556005561.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (165500655006503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283051451 + ... + 283635549.

It is an arithmetic number, because the mean of its divisors is an integer number (4107512108700).

Almost surely, 2^{165500655006500} is an apocalyptic number.

165500655006500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165500655006500 is an abundant number, since it is smaller than the sum of its proper divisors (228820507428700).

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

165500655006500 is a wasteful number, since it uses less digits than its factorization.

165500655006500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635646 (or 635634 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 44.

The spelling of 165500655006500 in words is "one hundred sixty-five trillion, five hundred billion, six hundred fifty-five million, six thousand, five hundred".