165120735563 has 8 divisors (see below), whose sum is σ = 189533472480. Its totient is φ = 140914013760.

The previous prime is 165120735557. The next prime is 165120735583. The reversal of 165120735563 is 365537021561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165120735563 - 2¹² = 165120731467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165120735503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51502058 + ... + 51505263.

It is an arithmetic number, because the mean of its divisors is an integer number (23691684060).

Almost surely, 2^165120735563 is an apocalyptic number.

165120735563 is a deficient number, since it is larger than the sum of its proper divisors (24412736917).

165120735563 is a wasteful number, since it uses less digits than its factorization.

165120735563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103007557.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 165120735563 in words is "one hundred sixty-five billion, one hundred twenty million, seven hundred thirty-five thousand, five hundred sixty-three".