3581406768493 has 2 divisors, whose sum is σ = 3581406768494. Its totient is φ = 3581406768492.

The previous prime is 3581406768479. The next prime is 3581406768497. The reversal of 3581406768493 is 3948676041853.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3562720425289 + 18686343204 = 1887517^2 + 136698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3581406768493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3581406768497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790703384246 + 1790703384247.

It is an arithmetic number, because the mean of its divisors is an integer number (1790703384247).

Almost surely, 2^{3581406768493} is an apocalyptic number.

It is an amenable number.

3581406768493 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581406768493 is an equidigital number, since it uses as much as digits as its factorization.

3581406768493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104509440, while the sum is 64.

The spelling of 3581406768493 in words is "three trillion, five hundred eighty-one billion, four hundred six million, seven hundred sixty-eight thousand, four hundred ninety-three".