131274778461 has 16 divisors (see below), whose sum is σ = 175333576704. Its totient is φ = 87366376944.

The previous prime is 131274778451. The next prime is 131274778469. The reversal of 131274778461 is 164877472131.

It is not a de Polignac number, because 131274778461 - 2¹³ = 131274770269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131274778469) 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, 4461580 + ... + 4490906.

It is an arithmetic number, because the mean of its divisors is an integer number (10958348544).

Almost surely, 2^131274778461 is an apocalyptic number.

It is an amenable number.

131274778461 is a deficient number, since it is larger than the sum of its proper divisors (44058798243).

131274778461 is a wasteful number, since it uses less digits than its factorization.

131274778461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31840.

The product of its digits is 1580544, while the sum is 51.

The spelling of 131274778461 in words is "one hundred thirty-one billion, two hundred seventy-four million, seven hundred seventy-eight thousand, four hundred sixty-one".