917797496641 has 2 divisors, whose sum is σ = 917797496642. Its totient is φ = 917797496640.

The previous prime is 917797496557. The next prime is 917797496669. The reversal of 917797496641 is 146694797719.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641432801025 + 276364695616 = 800895^2 + 525704^2 .

It is a cyclic number.

It is not a de Polignac number, because 917797496641 - 2²⁵ = 917763942209 is a prime.

It is not a weakly prime, because it can be changed into another prime (917797496041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458898748320 + 458898748321.

It is an arithmetic number, because the mean of its divisors is an integer number (458898748321).

Almost surely, 2^917797496641 is an apocalyptic number.

It is an amenable number.

917797496641 is a deficient number, since it is larger than the sum of its proper divisors (1).

917797496641 is an equidigital number, since it uses as much as digits as its factorization.

917797496641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144027072, while the sum is 70.

The spelling of 917797496641 in words is "nine hundred seventeen billion, seven hundred ninety-seven million, four hundred ninety-six thousand, six hundred forty-one".