4611306268561 has 2 divisors, whose sum is σ = 4611306268562. Its totient is φ = 4611306268560.

The previous prime is 4611306268549. The next prime is 4611306268571. The reversal of 4611306268561 is 1658626031164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3291176505600 + 1320129762961 = 1814160^2 + 1148969^2 .

It is a cyclic number.

It is not a de Polignac number, because 4611306268561 - 2⁵ = 4611306268529 is a prime.

It is not a weakly prime, because it can be changed into another prime (4611306268531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2305653134280 + 2305653134281.

It is an arithmetic number, because the mean of its divisors is an integer number (2305653134281).

Almost surely, 2^{4611306268561} is an apocalyptic number.

It is an amenable number.

4611306268561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4611306268561 is an equidigital number, since it uses as much as digits as its factorization.

4611306268561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 4611306268561 in words is "four trillion, six hundred eleven billion, three hundred six million, two hundred sixty-eight thousand, five hundred sixty-one".