15128016015 has 64 divisors (see below), whose sum is σ = 29315119104. Its totient is φ = 6503251968.

The previous prime is 15128015983. The next prime is 15128016017. The reversal of 15128016015 is 51061082151.

It is a Cunningham number, because it is equal to 122996²-1.

It is not a de Polignac number, because 15128016015 - 2⁵ = 15128015983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15128016017) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2579967 + ... + 2585823.

It is an arithmetic number, because the mean of its divisors is an integer number (458048736).

Almost surely, 2^15128016015 is an apocalyptic number.

15128016015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15128016015 is a deficient number, since it is larger than the sum of its proper divisors (14187103089).

15128016015 is a wasteful number, since it uses less digits than its factorization.

15128016015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7336.

The product of its (nonzero) digits is 2400, while the sum is 30.

Adding to 15128016015 its reverse (51061082151), we get a palindrome (66189098166).

The spelling of 15128016015 in words is "fifteen billion, one hundred twenty-eight million, sixteen thousand, fifteen".