11882657561 has 2 divisors, whose sum is σ = 11882657562. Its totient is φ = 11882657560.

The previous prime is 11882657557. The next prime is 11882657629. The reversal of 11882657561 is 16575628811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9866647561 + 2016010000 = 99331^2 + 44900^2 .

It is a cyclic number.

It is not a de Polignac number, because 11882657561 - 2² = 11882657557 is a prime.

It is not a weakly prime, because it can be changed into another prime (11882657861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5941328780 + 5941328781.

It is an arithmetic number, because the mean of its divisors is an integer number (5941328781).

Almost surely, 2^11882657561 is an apocalyptic number.

It is an amenable number.

11882657561 is a deficient number, since it is larger than the sum of its proper divisors (1).

11882657561 is an equidigital number, since it uses as much as digits as its factorization.

11882657561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 50.

The spelling of 11882657561 in words is "eleven billion, eight hundred eighty-two million, six hundred fifty-seven thousand, five hundred sixty-one".