165401614643 has 8 divisors (see below), whose sum is σ = 169444215360. Its totient is φ = 161359414720.

The previous prime is 165401614613. The next prime is 165401614661. The reversal of 165401614643 is 346416104561.

It is a happy number.

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 165401614643 - 2¹⁴ = 165401598259 is a prime.

It is a super-2 number, since 2×165401614643² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165401614643.

It is not an unprimeable number, because it can be changed into a prime (165401614613) 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 7 ways as a sum of consecutive naturals, for example, 842246 + ... + 1019892.

It is an arithmetic number, because the mean of its divisors is an integer number (21180526920).

Almost surely, 2^165401614643 is an apocalyptic number.

165401614643 is a deficient number, since it is larger than the sum of its proper divisors (4042600717).

165401614643 is a wasteful number, since it uses less digits than its factorization.

165401614643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200397.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 165401614643 in words is "one hundred sixty-five billion, four hundred one million, six hundred fourteen thousand, six hundred forty-three".