165953432447 has 8 divisors (see below), whose sum is σ = 181127888640. Its totient is φ = 150793606360.

The previous prime is 165953432441. The next prime is 165953432509. The reversal of 165953432447 is 744234359561.

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 165953432447 - 2¹⁴ = 165953416063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165953432441) 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, 3633797 + ... + 3679182.

It is an arithmetic number, because the mean of its divisors is an integer number (22640986080).

Almost surely, 2^165953432447 is an apocalyptic number.

165953432447 is a deficient number, since it is larger than the sum of its proper divisors (15174456193).

165953432447 is a wasteful number, since it uses less digits than its factorization.

165953432447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7315053.

The product of its digits is 10886400, while the sum is 53.

The spelling of 165953432447 in words is "one hundred sixty-five billion, nine hundred fifty-three million, four hundred thirty-two thousand, four hundred forty-seven".