1617431457647 has 2 divisors, whose sum is σ = 1617431457648. Its totient is φ = 1617431457646.

The previous prime is 1617431457613. The next prime is 1617431457661. The reversal of 1617431457647 is 7467541347161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1617431457647 - 2⁸ = 1617431457391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1617431457592 and 1617431457601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1617431457947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808715728823 + 808715728824.

It is an arithmetic number, because the mean of its divisors is an integer number (808715728824).

Almost surely, 2^{1617431457647} is an apocalyptic number.

1617431457647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617431457647 is an equidigital number, since it uses as much as digits as its factorization.

1617431457647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11854080, while the sum is 56.

The spelling of 1617431457647 in words is "one trillion, six hundred seventeen billion, four hundred thirty-one million, four hundred fifty-seven thousand, six hundred forty-seven".