2497522502261 has 2 divisors, whose sum is σ = 2497522502262. Its totient is φ = 2497522502260.

The previous prime is 2497522502249. The next prime is 2497522502317. The reversal of 2497522502261 is 1622052257942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2314140712900 + 183381789361 = 1521230^2 + 428231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2497522502261 is a prime.

It is a super-2 number, since 2×2497522502261² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2497522501261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248761251130 + 1248761251131.

It is an arithmetic number, because the mean of its divisors is an integer number (1248761251131).

Almost surely, 2^{2497522502261} is an apocalyptic number.

It is an amenable number.

2497522502261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2497522502261 is an equidigital number, since it uses as much as digits as its factorization.

2497522502261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The spelling of 2497522502261 in words is "two trillion, four hundred ninety-seven billion, five hundred twenty-two million, five hundred two thousand, two hundred sixty-one".