155166011111 has 8 divisors (see below), whose sum is σ = 158150104560. Its totient is φ = 152238204456.

The previous prime is 155166011093. The next prime is 155166011113. The reversal of 155166011111 is 111110661551.

It is a happy number.

155166011111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155166011111 - 2⁶ = 155166011047 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 (155166011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372245 + ... + 669998.

It is an arithmetic number, because the mean of its divisors is an integer number (19768763070).

Almost surely, 2^155166011111 is an apocalyptic number.

155166011111 is a deficient number, since it is larger than the sum of its proper divisors (2984093449).

155166011111 is an frugal number, since it uses more digits than its factorization.

155166011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042402 (or 1042296 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 29.

Adding to 155166011111 its reverse (111110661551), we get a palindrome (266276672662).

The spelling of 155166011111 in words is "one hundred fifty-five billion, one hundred sixty-six million, eleven thousand, one hundred eleven".