131778772672515 has 16 divisors (see below), whose sum is σ = 210884351152128. Its totient is φ = 70269240466656.

The previous prime is 131778772672493. The next prime is 131778772672583. The reversal of 131778772672515 is 515276277877131.

It is not a de Polignac number, because 131778772672515 - 2⁹ = 131778772672003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131778772672515.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798141289 + ... + 798306378.

It is an arithmetic number, because the mean of its divisors is an integer number (13180271947008).

Almost surely, 2^{131778772672515} is an apocalyptic number.

131778772672515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

131778772672515 is a deficient number, since it is larger than the sum of its proper divisors (79105578479613).

131778772672515 is a wasteful number, since it uses less digits than its factorization.

131778772672515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596453178.

The product of its digits is 242020800, while the sum is 69.

The spelling of 131778772672515 in words is "one hundred thirty-one trillion, seven hundred seventy-eight billion, seven hundred seventy-two million, six hundred seventy-two thousand, five hundred fifteen".