15955798515 has 16 divisors (see below), whose sum is σ = 25816125600. Its totient is φ = 8414143232.

The previous prime is 15955798501. The next prime is 15955798519. The reversal of 15955798515 is 51589755951.

It is a cyclic number.

It is not a de Polignac number, because 15955798515 - 2⁴ = 15955798499 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15955798519) 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 15 ways as a sum of consecutive naturals, for example, 5974620 + ... + 5977289.

It is an arithmetic number, because the mean of its divisors is an integer number (1613507850).

Almost surely, 2^15955798515 is an apocalyptic number.

15955798515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15955798515 is a deficient number, since it is larger than the sum of its proper divisors (9860327085).

15955798515 is a wasteful number, since it uses less digits than its factorization.

15955798515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11952006.

The product of its digits is 14175000, while the sum is 60.

The spelling of 15955798515 in words is "fifteen billion, nine hundred fifty-five million, seven hundred ninety-eight thousand, five hundred fifteen".