245169561281 has 2 divisors, whose sum is σ = 245169561282. Its totient is φ = 245169561280.

The previous prime is 245169561269. The next prime is 245169561383. The reversal of 245169561281 is 182165961542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235768513600 + 9401047681 = 485560^2 + 96959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245169561281 is a prime.

It is a super-2 number, since 2×245169561281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245169561251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122584780640 + 122584780641.

It is an arithmetic number, because the mean of its divisors is an integer number (122584780641).

Almost surely, 2^245169561281 is an apocalyptic number.

It is an amenable number.

245169561281 is a deficient number, since it is larger than the sum of its proper divisors (1).

245169561281 is an equidigital number, since it uses as much as digits as its factorization.

245169561281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1036800, while the sum is 50.

The spelling of 245169561281 in words is "two hundred forty-five billion, one hundred sixty-nine million, five hundred sixty-one thousand, two hundred eighty-one".