15505120115 has 16 divisors (see below), whose sum is σ = 19244928000. Its totient is φ = 11979848160.

The previous prime is 15505120013. The next prime is 15505120129. The reversal of 15505120115 is 51102150551.

It is not a de Polignac number, because 15505120115 - 2¹² = 15505116019 is a prime.

It is a super-2 number, since 2×15505120115² (a number of 21 digits) contains 22 as substring.

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, 22889 + ... + 177578.

It is an arithmetic number, because the mean of its divisors is an integer number (1202808000).

Almost surely, 2^15505120115 is an apocalyptic number.

15505120115 is a deficient number, since it is larger than the sum of its proper divisors (3739807885).

15505120115 is a wasteful number, since it uses less digits than its factorization.

15505120115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201002.

The product of its (nonzero) digits is 1250, while the sum is 26.

Adding to 15505120115 its reverse (51102150551), we get a palindrome (66607270666).

The spelling of 15505120115 in words is "fifteen billion, five hundred five million, one hundred twenty thousand, one hundred fifteen".