131440407457 has 2 divisors, whose sum is σ = 131440407458. Its totient is φ = 131440407456.

The previous prime is 131440407443. The next prime is 131440407463. The reversal of 131440407457 is 754704044131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117440548416 + 13999859041 = 342696^2 + 118321^2 .

It is a cyclic number.

It is not a de Polignac number, because 131440407457 - 2¹¹ = 131440405409 is a prime.

It is not a weakly prime, because it can be changed into another prime (131440407467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65720203728 + 65720203729.

It is an arithmetic number, because the mean of its divisors is an integer number (65720203729).

Almost surely, 2^131440407457 is an apocalyptic number.

It is an amenable number.

131440407457 is a deficient number, since it is larger than the sum of its proper divisors (1).

131440407457 is an equidigital number, since it uses as much as digits as its factorization.

131440407457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188160, while the sum is 40.

The spelling of 131440407457 in words is "one hundred thirty-one billion, four hundred forty million, four hundred seven thousand, four hundred fifty-seven".