165015601015 has 4 divisors (see below), whose sum is σ = 198018721224. Its totient is φ = 132012480808.

The previous prime is 165015601013. The next prime is 165015601019. The reversal of 165015601015 is 510106510561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510106510561 = 20249 ⋅25191689.

It is a cyclic number.

It is not a de Polignac number, because 165015601015 - 2¹ = 165015601013 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 (165015601013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16501560097 + ... + 16501560106.

It is an arithmetic number, because the mean of its divisors is an integer number (49504680306).

Almost surely, 2^165015601015 is an apocalyptic number.

165015601015 is a deficient number, since it is larger than the sum of its proper divisors (33003120209).

165015601015 is an equidigital number, since it uses as much as digits as its factorization.

165015601015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003120208.

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 165015601015 in words is "one hundred sixty-five billion, fifteen million, six hundred one thousand, fifteen".