2465856100261 has 2 divisors, whose sum is σ = 2465856100262. Its totient is φ = 2465856100260.

The previous prime is 2465856100259. The next prime is 2465856100289. The reversal of 2465856100261 is 1620016585642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2071855087236 + 394001013025 = 1439394^2 + 627695^2 .

It is a cyclic number.

It is not a de Polignac number, because 2465856100261 - 2¹ = 2465856100259 is a prime.

Together with 2465856100259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2465856100231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1232928050130 + 1232928050131.

It is an arithmetic number, because the mean of its divisors is an integer number (1232928050131).

Almost surely, 2^{2465856100261} is an apocalyptic number.

It is an amenable number.

2465856100261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2465856100261 is an equidigital number, since it uses as much as digits as its factorization.

2465856100261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 2465856100261 in words is "two trillion, four hundred sixty-five billion, eight hundred fifty-six million, one hundred thousand, two hundred sixty-one".