3072745561 has 2 divisors, whose sum is σ = 3072745562. Its totient is φ = 3072745560.

The previous prime is 3072745553. The next prime is 3072745589. The reversal of 3072745561 is 1655472703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2620928025 + 451817536 = 51195^2 + 21256^2 .

It is a cyclic number.

It is not a de Polignac number, because 3072745561 - 2³ = 3072745553 is a prime.

It is not a weakly prime, because it can be changed into another prime (3072745541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1536372780 + 1536372781.

It is an arithmetic number, because the mean of its divisors is an integer number (1536372781).

Almost surely, 2^3072745561 is an apocalyptic number.

It is an amenable number.

3072745561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3072745561 is an equidigital number, since it uses as much as digits as its factorization.

3072745561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 40.

The square root of 3072745561 is about 55432.3512129875. The cubic root of 3072745561 is about 1453.8140666843.

The spelling of 3072745561 in words is "three billion, seventy-two million, seven hundred forty-five thousand, five hundred sixty-one".