155111515116 has 12 divisors (see below), whose sum is σ = 361926868632. Its totient is φ = 51703838368.

The previous prime is 155111515087. The next prime is 155111515171. The reversal of 155111515116 is 611515111551.

155111515116 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6462979785 + ... + 6462979808.

It is an arithmetic number, because the mean of its divisors is an integer number (30160572386).

Almost surely, 2^155111515116 is an apocalyptic number.

It is an amenable number.

155111515116 is an abundant number, since it is smaller than the sum of its proper divisors (206815353516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155111515116 is a wasteful number, since it uses less digits than its factorization.

155111515116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925959600 (or 12925959598 counting only the distinct ones).

The product of its digits is 3750, while the sum is 33.

Adding to 155111515116 its reverse (611515111551), we get a palindrome (766626626667).

The spelling of 155111515116 in words is "one hundred fifty-five billion, one hundred eleven million, five hundred fifteen thousand, one hundred sixteen".