165220653364530 has 64 divisors (see below), whose sum is σ = 409324388594688. Its totient is φ = 42637218785280.

The previous prime is 165220653364519. The next prime is 165220653364537. The reversal of 165220653364530 is 35463356022561.

It is a super-4 number, since 4×165220653364530⁴ (a number of 58 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (165220653364537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116266374 + ... + 117678846.

It is an arithmetic number, because the mean of its divisors is an integer number (6395693571792).

Almost surely, 2^{165220653364530} is an apocalyptic number.

165220653364530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165220653364530 is an abundant number, since it is smaller than the sum of its proper divisors (244103735230158).

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

165220653364530 is a wasteful number, since it uses less digits than its factorization.

165220653364530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538291.

The product of its (nonzero) digits is 11664000, while the sum is 51.

The spelling of 165220653364530 in words is "one hundred sixty-five trillion, two hundred twenty billion, six hundred fifty-three million, three hundred sixty-four thousand, five hundred thirty".