1431571602991 has 2 divisors, whose sum is σ = 1431571602992. Its totient is φ = 1431571602990.

The previous prime is 1431571602953. The next prime is 1431571603003. The reversal of 1431571602991 is 1992061751341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1431571602991 - 2²⁵ = 1431538048559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1431571602491) 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 as a sum of consecutive naturals, namely, 715785801495 + 715785801496.

It is an arithmetic number, because the mean of its divisors is an integer number (715785801496).

Almost surely, 2^{1431571602991} is an apocalyptic number.

1431571602991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1431571602991 is an equidigital number, since it uses as much as digits as its factorization.

1431571602991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 1431571602991 in words is "one trillion, four hundred thirty-one billion, five hundred seventy-one million, six hundred two thousand, nine hundred ninety-one".