245892491617 has 2 divisors, whose sum is σ = 245892491618. Its totient is φ = 245892491616.

The previous prime is 245892491513. The next prime is 245892491639. The reversal of 245892491617 is 716194298542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217669835601 + 28222656016 = 466551^2 + 167996^2 .

It is a cyclic number.

It is not a de Polignac number, because 245892491617 - 2¹¹ = 245892489569 is a prime.

It is not a weakly prime, because it can be changed into another prime (245892491657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122946245808 + 122946245809.

It is an arithmetic number, because the mean of its divisors is an integer number (122946245809).

Almost surely, 2^245892491617 is an apocalyptic number.

It is an amenable number.

245892491617 is a deficient number, since it is larger than the sum of its proper divisors (1).

245892491617 is an equidigital number, since it uses as much as digits as its factorization.

245892491617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 58.

The spelling of 245892491617 in words is "two hundred forty-five billion, eight hundred ninety-two million, four hundred ninety-one thousand, six hundred seventeen".