3111652561 has 2 divisors, whose sum is σ = 3111652562. Its totient is φ = 3111652560.

The previous prime is 3111652519. The next prime is 3111652571. The reversal of 3111652561 is 1652561113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2953270336 + 158382225 = 54344^2 + 12585^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111652561 - 2⁷ = 3111652433 is a prime.

It is not a weakly prime, because it can be changed into another prime (3111652501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1555826280 + 1555826281.

It is an arithmetic number, because the mean of its divisors is an integer number (1555826281).

Almost surely, 2^3111652561 is an apocalyptic number.

It is an amenable number.

3111652561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111652561 is an equidigital number, since it uses as much as digits as its factorization.

3111652561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 3111652561 is about 55782.1885640928. The cubic root of 3111652561 is about 1459.9243973174.

The spelling of 3111652561 in words is "three billion, one hundred eleven million, six hundred fifty-two thousand, five hundred sixty-one".