155111515115 has 16 divisors (see below), whose sum is σ = 192569227200. Its totient is φ = 119799695232.

The previous prime is 155111515087. The next prime is 155111515171. The reversal of 155111515115 is 511515111551.

It is a cyclic number.

It is not a de Polignac number, because 155111515115 - 2⁶ = 155111515051 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867409 + ... + 1948701.

It is an arithmetic number, because the mean of its divisors is an integer number (12035576700).

Almost surely, 2^155111515115 is an apocalyptic number.

155111515115 is a deficient number, since it is larger than the sum of its proper divisors (37457712085).

155111515115 is a wasteful number, since it uses less digits than its factorization.

155111515115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94486.

The product of its digits is 3125, while the sum is 32.

Adding to 155111515115 its reverse (511515111551), we get a palindrome (666626626666).

The spelling of 155111515115 in words is "one hundred fifty-five billion, one hundred eleven million, five hundred fifteen thousand, one hundred fifteen".