1617320309441 has 2 divisors, whose sum is σ = 1617320309442. Its totient is φ = 1617320309440.

The previous prime is 1617320309359. The next prime is 1617320309483. The reversal of 1617320309441 is 1449030237161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 884248719025 + 733071590416 = 940345^2 + 856196^2 .

It is a cyclic number.

It is not a de Polignac number, because 1617320309441 - 2²² = 1617316115137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1617320308441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808660154720 + 808660154721.

It is an arithmetic number, because the mean of its divisors is an integer number (808660154721).

Almost surely, 2^{1617320309441} is an apocalyptic number.

It is an amenable number.

1617320309441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1617320309441 is an equidigital number, since it uses as much as digits as its factorization.

1617320309441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 1617320309441 in words is "one trillion, six hundred seventeen billion, three hundred twenty million, three hundred nine thousand, four hundred forty-one".