165950938279 has 8 divisors (see below), whose sum is σ = 190186513920. Its totient is φ = 141847437336.

The previous prime is 165950938277. The next prime is 165950938291. The reversal of 165950938279 is 972839059561.

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 165950938279 - 2¹ = 165950938277 is a prime.

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 165950938279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165950938273) 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, 33015979 + ... + 33021004.

It is an arithmetic number, because the mean of its divisors is an integer number (23773314240).

Almost surely, 2^165950938279 is an apocalyptic number.

165950938279 is a deficient number, since it is larger than the sum of its proper divisors (24235575641).

165950938279 is an equidigital number, since it uses as much as digits as its factorization.

165950938279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66037349.

The product of its (nonzero) digits is 36741600, while the sum is 64.

The spelling of 165950938279 in words is "one hundred sixty-five billion, nine hundred fifty million, nine hundred thirty-eight thousand, two hundred seventy-nine".