2576426871661 has 2 divisors, whose sum is σ = 2576426871662. Its totient is φ = 2576426871660.

The previous prime is 2576426871617. The next prime is 2576426871701. The reversal of 2576426871661 is 1661786246752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2564142474436 + 12284397225 = 1601294^2 + 110835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2576426871661 is a prime.

It is a super-3 number, since 3×2576426871661³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2576426871661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2576426871461) 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, 1288213435830 + 1288213435831.

It is an arithmetic number, because the mean of its divisors is an integer number (1288213435831).

Almost surely, 2^{2576426871661} is an apocalyptic number.

It is an amenable number.

2576426871661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2576426871661 is an equidigital number, since it uses as much as digits as its factorization.

2576426871661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40642560, while the sum is 61.

The spelling of 2576426871661 in words is "two trillion, five hundred seventy-six billion, four hundred twenty-six million, eight hundred seventy-one thousand, six hundred sixty-one".