7927105561 has 2 divisors, whose sum is σ = 7927105562. Its totient is φ = 7927105560.

The previous prime is 7927105553. The next prime is 7927105579. The reversal of 7927105561 is 1655017297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4286189961 + 3640915600 = 65469^2 + 60340^2 .

It is an emirp because it is prime and its reverse (1655017297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7927105561 - 2³ = 7927105553 is a prime.

It is not a weakly prime, because it can be changed into another prime (7927105541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3963552780 + 3963552781.

It is an arithmetic number, because the mean of its divisors is an integer number (3963552781).

Almost surely, 2^7927105561 is an apocalyptic number.

It is an amenable number.

7927105561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7927105561 is an equidigital number, since it uses as much as digits as its factorization.

7927105561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300, while the sum is 43.

The square root of 7927105561 is about 89034.2942971976. The cubic root of 7927105561 is about 1993.9069194522.

The spelling of 7927105561 in words is "seven billion, nine hundred twenty-seven million, one hundred five thousand, five hundred sixty-one".