1965598883431 has 2 divisors, whose sum is σ = 1965598883432. Its totient is φ = 1965598883430.

The previous prime is 1965598883429. The next prime is 1965598883441. The reversal of 1965598883431 is 1343888955691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1965598883431 - 2¹ = 1965598883429 is a prime.

It is a super-4 number, since 4×1965598883431⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 1965598883429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1965598883441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982799441715 + 982799441716.

It is an arithmetic number, because the mean of its divisors is an integer number (982799441716).

Almost surely, 2^{1965598883431} is an apocalyptic number.

1965598883431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965598883431 is an equidigital number, since it uses as much as digits as its factorization.

1965598883431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 223948800, while the sum is 70.

The spelling of 1965598883431 in words is "one trillion, nine hundred sixty-five billion, five hundred ninety-eight million, eight hundred eighty-three thousand, four hundred thirty-one".