165944955 has 64 divisors (see below), whose sum is σ = 312238080. Its totient is φ = 74390400.

The previous prime is 165944941. The next prime is 165944957. The reversal of 165944955 is 559449561.

It is not a de Polignac number, because 165944955 - 2¹³ = 165936763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165944957) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 134190 + ... + 135420.

It is an arithmetic number, because the mean of its divisors is an integer number (4878720).

Almost surely, 2^165944955 is an apocalyptic number.

165944955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165944955 is a deficient number, since it is larger than the sum of its proper divisors (146293125).

165944955 is a wasteful number, since it uses less digits than its factorization.

165944955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312.

The product of its digits is 972000, while the sum is 48.

The square root of 165944955 is about 12881.9623893256. The cubic root of 165944955 is about 549.5257123319.

It can be divided in two parts, 1 and 65944955, that added together give a palindrome (65944956).

The spelling of 165944955 in words is "one hundred sixty-five million, nine hundred forty-four thousand, nine hundred fifty-five".