165542435505 has 32 divisors (see below), whose sum is σ = 304445865600. Its totient is φ = 85244838336.

The previous prime is 165542435501. The next prime is 165542435519. The reversal of 165542435505 is 505534245561.

165542435505 is a `hidden beast` number, since 1 + 6 + 5 + 54 + 2 + 43 + 550 + 5 = 666.

It is not a de Polignac number, because 165542435505 - 2² = 165542435501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (165542435501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21138159 + ... + 21145988.

It is an arithmetic number, because the mean of its divisors is an integer number (9513933300).

Almost surely, 2^165542435505 is an apocalyptic number.

165542435505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165542435505 is a deficient number, since it is larger than the sum of its proper divisors (138903430095).

165542435505 is a wasteful number, since it uses less digits than its factorization.

165542435505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42284190 (or 42284184 counting only the distinct ones).

The product of its (nonzero) digits is 1800000, while the sum is 45.

The spelling of 165542435505 in words is "one hundred sixty-five billion, five hundred forty-two million, four hundred thirty-five thousand, five hundred five".