165015216611 has 8 divisors (see below), whose sum is σ = 192974605824. Its totient is φ = 138152274120.

The previous prime is 165015216601. The next prime is 165015216629. The reversal of 165015216611 is 116612510561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-165015216611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165015216601) 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, 274111355 + ... + 274111956.

It is an arithmetic number, because the mean of its divisors is an integer number (24121825728).

Almost surely, 2^165015216611 is an apocalyptic number.

165015216611 is a deficient number, since it is larger than the sum of its proper divisors (27959389213).

165015216611 is an equidigital number, since it uses as much as digits as its factorization.

165015216611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548223361.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 165015216611 in words is "one hundred sixty-five billion, fifteen million, two hundred sixteen thousand, six hundred eleven".