131784878515787 has 8 divisors (see below), whose sum is σ = 158538199718400. Its totient is φ = 107013284809704.

The previous prime is 131784878515757. The next prime is 131784878515789. The reversal of 131784878515787 is 787515878487131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131784878515787 - 2²² = 131784874321483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131784878515789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495431873987 + ... + 495431874252.

It is an arithmetic number, because the mean of its divisors is an integer number (19817274964800).

Almost surely, 2^{131784878515787} is an apocalyptic number.

131784878515787 is a deficient number, since it is larger than the sum of its proper divisors (26753321202613).

131784878515787 is an equidigital number, since it uses as much as digits as its factorization.

131784878515787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990863748265.

The product of its digits is 2950348800, while the sum is 80.

The spelling of 131784878515787 in words is "one hundred thirty-one trillion, seven hundred eighty-four billion, eight hundred seventy-eight million, five hundred fifteen thousand, seven hundred eighty-seven".