3260557561 has 2 divisors, whose sum is σ = 3260557562. Its totient is φ = 3260557560.

The previous prime is 3260557541. The next prime is 3260557577. The reversal of 3260557561 is 1657550623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3051899536 + 208658025 = 55244^2 + 14445^2 .

It is a cyclic number.

It is not a de Polignac number, because 3260557561 - 2²¹ = 3258460409 is a prime.

It is not a weakly prime, because it can be changed into another prime (3260557501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630278780 + 1630278781.

It is an arithmetic number, because the mean of its divisors is an integer number (1630278781).

Almost surely, 2^3260557561 is an apocalyptic number.

It is an amenable number.

3260557561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3260557561 is an equidigital number, since it uses as much as digits as its factorization.

3260557561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 3260557561 is about 57101.2921132263. The cubic root of 3260557561 is about 1482.8502355708.

The spelling of 3260557561 in words is "three billion, two hundred sixty million, five hundred fifty-seven thousand, five hundred sixty-one".