131091456722 has 6 divisors (see below), whose sum is σ = 196637953143. Its totient is φ = 65545472342.

The previous prime is 131091456689. The next prime is 131091456787. The reversal of 131091456722 is 227654190131.

It can be written as a sum of positive squares in only one way, i.e., 65545728361 + 65545728361 = 256019^2 + 256019^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=256019.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131091456722.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 384029 + ... + 640047.

Almost surely, 2^131091456722 is an apocalyptic number.

131091456722 is a deficient number, since it is larger than the sum of its proper divisors (65546496421).

131091456722 is an frugal number, since it uses more digits than its factorization.

131091456722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512040 (or 256021 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 131091456722 in words is "one hundred thirty-one billion, ninety-one million, four hundred fifty-six thousand, seven hundred twenty-two".