245406552761 has 2 divisors, whose sum is σ = 245406552762. Its totient is φ = 245406552760.

The previous prime is 245406552731. The next prime is 245406552763. The reversal of 245406552761 is 167255604542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204286824361 + 41119728400 = 451981^2 + 202780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245406552761 is a prime.

It is a super-2 number, since 2×245406552761² (a number of 24 digits) contains 22 as substring.

Together with 245406552763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245406552763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122703276380 + 122703276381.

It is an arithmetic number, because the mean of its divisors is an integer number (122703276381).

Almost surely, 2^245406552761 is an apocalyptic number.

It is an amenable number.

245406552761 is a deficient number, since it is larger than the sum of its proper divisors (1).

245406552761 is an equidigital number, since it uses as much as digits as its factorization.

245406552761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 47.

The spelling of 245406552761 in words is "two hundred forty-five billion, four hundred six million, five hundred fifty-two thousand, seven hundred sixty-one".