165213003556645 has 32 divisors (see below), whose sum is σ = 217624737498624. Its totient is φ = 119407802726400.

The previous prime is 165213003556619. The next prime is 165213003556661. The reversal of 165213003556645 is 546655300312561.

It is not a de Polignac number, because 165213003556645 - 2²³ = 165212995168037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165213003556592 and 165213003556601.

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, 17808100 + ... + 25447090.

It is an arithmetic number, because the mean of its divisors is an integer number (6800773046832).

Almost surely, 2^{165213003556645} is an apocalyptic number.

It is an amenable number.

165213003556645 is a deficient number, since it is larger than the sum of its proper divisors (52411733941979).

165213003556645 is a wasteful number, since it uses less digits than its factorization.

165213003556645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641453.

The product of its (nonzero) digits is 9720000, while the sum is 52.

The spelling of 165213003556645 in words is "one hundred sixty-five trillion, two hundred thirteen billion, three million, five hundred fifty-six thousand, six hundred forty-five".