8465516261 has 2 divisors, whose sum is σ = 8465516262. Its totient is φ = 8465516260.

The previous prime is 8465516243. The next prime is 8465516303. The reversal of 8465516261 is 1626155648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5383156900 + 3082359361 = 73370^2 + 55519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8465516261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8465516561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4232758130 + 4232758131.

It is an arithmetic number, because the mean of its divisors is an integer number (4232758131).

Almost surely, 2^8465516261 is an apocalyptic number.

It is an amenable number.

8465516261 is a deficient number, since it is larger than the sum of its proper divisors (1).

8465516261 is an equidigital number, since it uses as much as digits as its factorization.

8465516261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345600, while the sum is 44.

The square root of 8465516261 is about 92008.2401798882. The cubic root of 8465516261 is about 2038.0639921924.

The spelling of 8465516261 in words is "eight billion, four hundred sixty-five million, five hundred sixteen thousand, two hundred sixty-one".