165954737755 has 4 divisors (see below), whose sum is σ = 199145685312. Its totient is φ = 132763790200.

The previous prime is 165954737737. The next prime is 165954737759. The reversal of 165954737755 is 557737459561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165954737755 - 2⁵ = 165954737723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165954737759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16595473771 + ... + 16595473780.

It is an arithmetic number, because the mean of its divisors is an integer number (49786421328).

Almost surely, 2^165954737755 is an apocalyptic number.

165954737755 is a deficient number, since it is larger than the sum of its proper divisors (33190947557).

165954737755 is an equidigital number, since it uses as much as digits as its factorization.

165954737755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33190947556.

The product of its digits is 138915000, while the sum is 64.

The spelling of 165954737755 in words is "one hundred sixty-five billion, nine hundred fifty-four million, seven hundred thirty-seven thousand, seven hundred fifty-five".