165313544465020 has 96 divisors (see below), whose sum is σ = 417650296089600. Its totient is φ = 53693760743424.

The previous prime is 165313544464997. The next prime is 165313544465057. The reversal of 165313544465020 is 20564445313561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68676396 + ... + 71042764.

It is an arithmetic number, because the mean of its divisors is an integer number (4350523917600).

Almost surely, 2^{165313544465020} is an apocalyptic number.

165313544465020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165313544465020 is an abundant number, since it is smaller than the sum of its proper divisors (252336751624580).

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

165313544465020 is a wasteful number, since it uses less digits than its factorization.

165313544465020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392667 (or 2392665 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 49.

Adding to 165313544465020 its reverse (20564445313561), we get a palindrome (185877989778581).

The spelling of 165313544465020 in words is "one hundred sixty-five trillion, three hundred thirteen billion, five hundred forty-four million, four hundred sixty-five thousand, twenty".