165011165011 has 32 divisors (see below), whose sum is σ = 207883063296. Its totient is φ = 127234800000.

The previous prime is 165011165009. The next prime is 165011165051. The reversal of 165011165011 is 110561110561.

It is not a de Polignac number, because 165011165011 - 2¹ = 165011165009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165011165051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16661161 + ... + 16671061.

It is an arithmetic number, because the mean of its divisors is an integer number (6496345728).

Almost surely, 2^165011165011 is an apocalyptic number.

165011165011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165011165011 is a deficient number, since it is larger than the sum of its proper divisors (42871898285).

165011165011 is a wasteful number, since it uses less digits than its factorization.

165011165011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12163.

The product of its (nonzero) digits is 900, while the sum is 28.

Adding to 165011165011 its reverse (110561110561), we get a palindrome (275572275572).

The spelling of 165011165011 in words is "one hundred sixty-five billion, eleven million, one hundred sixty-five thousand, eleven".