131504540449 has 2 divisors, whose sum is σ = 131504540450. Its totient is φ = 131504540448.

The previous prime is 131504540441. The next prime is 131504540501. The reversal of 131504540449 is 944045405131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97136942224 + 34367598225 = 311668^2 + 185385^2 .

It is a cyclic number.

It is not a de Polignac number, because 131504540449 - 2³ = 131504540441 is a prime.

It is not a weakly prime, because it can be changed into another prime (131504540441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65752270224 + 65752270225.

It is an arithmetic number, because the mean of its divisors is an integer number (65752270225).

Almost surely, 2^131504540449 is an apocalyptic number.

It is an amenable number.

131504540449 is a deficient number, since it is larger than the sum of its proper divisors (1).

131504540449 is an equidigital number, since it uses as much as digits as its factorization.

131504540449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 131504540449 in words is "one hundred thirty-one billion, five hundred four million, five hundred forty thousand, four hundred forty-nine".