131784679825 has 6 divisors (see below), whose sum is σ = 163413003014. Its totient is φ = 105427743840.

The previous prime is 131784679769. The next prime is 131784679843. The reversal of 131784679825 is 528976487131.

It can be written as a sum of positive squares in 3 ways, for example, as 14065011216 + 117719668609 = 118596^2 + 343103^2 .

It is not a de Polignac number, because 131784679825 - 2¹⁹ = 131784155537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2635693572 + ... + 2635693621.

Almost surely, 2^131784679825 is an apocalyptic number.

It is an amenable number.

131784679825 is a deficient number, since it is larger than the sum of its proper divisors (31628323189).

131784679825 is an equidigital number, since it uses as much as digits as its factorization.

131784679825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271387203 (or 5271387198 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 61.

The spelling of 131784679825 in words is "one hundred thirty-one billion, seven hundred eighty-four million, six hundred seventy-nine thousand, eight hundred twenty-five".