1578948831631 has 2 divisors, whose sum is σ = 1578948831632. Its totient is φ = 1578948831630.

The previous prime is 1578948831569. The next prime is 1578948831689. The reversal of 1578948831631 is 1361388498751.

It is a strong prime.

It is an emirp because it is prime and its reverse (1361388498751) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1578948831631 is a prime.

It is a super-2 number, since 2×1578948831631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1578948832631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789474415815 + 789474415816.

It is an arithmetic number, because the mean of its divisors is an integer number (789474415816).

Almost surely, 2^{1578948831631} is an apocalyptic number.

1578948831631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1578948831631 is an equidigital number, since it uses as much as digits as its factorization.

1578948831631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34836480, while the sum is 64.

The spelling of 1578948831631 in words is "one trillion, five hundred seventy-eight billion, nine hundred forty-eight million, eight hundred thirty-one thousand, six hundred thirty-one".