7931231598481 has 2 divisors, whose sum is σ = 7931231598482. Its totient is φ = 7931231598480.

The previous prime is 7931231598473. The next prime is 7931231598503. The reversal of 7931231598481 is 1848951321397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5902999892881 + 2028231705600 = 2429609^2 + 1424160^2 .

It is a cyclic number.

It is not a de Polignac number, because 7931231598481 - 2³ = 7931231598473 is a prime.

It is a super-2 number, since 2×7931231598481² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7931231592481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3965615799240 + 3965615799241.

It is an arithmetic number, because the mean of its divisors is an integer number (3965615799241).

Almost surely, 2^{7931231598481} is an apocalyptic number.

It is an amenable number.

7931231598481 is a deficient number, since it is larger than the sum of its proper divisors (1).

7931231598481 is an equidigital number, since it uses as much as digits as its factorization.

7931231598481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 61.

The spelling of 7931231598481 in words is "seven trillion, nine hundred thirty-one billion, two hundred thirty-one million, five hundred ninety-eight thousand, four hundred eighty-one".