165465478102921 has 8 divisors (see below), whose sum is σ = 165521460948480. Its totient is φ = 165409499370192.

The previous prime is 165465478102913. The next prime is 165465478102937. The reversal of 165465478102921 is 129201874564561.

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 165465478102921 - 2³ = 165465478102913 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 165465478102921.

It is not an unprimeable number, because it can be changed into a prime (165465478102621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80541336 + ... + 82570198.

It is an arithmetic number, because the mean of its divisors is an integer number (20690182618560).

Almost surely, 2^{165465478102921} is an apocalyptic number.

It is an amenable number.

165465478102921 is a deficient number, since it is larger than the sum of its proper divisors (55982845559).

165465478102921 is a wasteful number, since it uses less digits than its factorization.

165465478102921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056415.

The product of its (nonzero) digits is 29030400, while the sum is 61.

The spelling of 165465478102921 in words is "one hundred sixty-five trillion, four hundred sixty-five billion, four hundred seventy-eight million, one hundred two thousand, nine hundred twenty-one".