495961899281 has 2 divisors, whose sum is σ = 495961899282. Its totient is φ = 495961899280.

The previous prime is 495961899263. The next prime is 495961899289. The reversal of 495961899281 is 182998169594.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392397005056 + 103564894225 = 626416^2 + 321815^2 .

It is a cyclic number.

It is not a de Polignac number, because 495961899281 - 2³⁰ = 494888157457 is a prime.

It is a super-2 number, since 2×495961899281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (495961899289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247980949640 + 247980949641.

It is an arithmetic number, because the mean of its divisors is an integer number (247980949641).

Almost surely, 2^495961899281 is an apocalyptic number.

It is an amenable number.

495961899281 is a deficient number, since it is larger than the sum of its proper divisors (1).

495961899281 is an equidigital number, since it uses as much as digits as its factorization.

495961899281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100776960, while the sum is 71.

The spelling of 495961899281 in words is "four hundred ninety-five billion, nine hundred sixty-one million, eight hundred ninety-nine thousand, two hundred eighty-one".