440456135300261 has 2 divisors, whose sum is σ = 440456135300262. Its totient is φ = 440456135300260.

The previous prime is 440456135300249. The next prime is 440456135300263. The reversal of 440456135300261 is 162003531654044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366048155788225 + 74407979512036 = 19132385^2 + 8626006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440456135300261 is a prime.

Together with 440456135300263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440456135300263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220228067650130 + 220228067650131.

It is an arithmetic number, because the mean of its divisors is an integer number (220228067650131).

Almost surely, 2^{440456135300261} is an apocalyptic number.

It is an amenable number.

440456135300261 is a deficient number, since it is larger than the sum of its proper divisors (1).

440456135300261 is an equidigital number, since it uses as much as digits as its factorization.

440456135300261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 440456135300261 in words is "four hundred forty trillion, four hundred fifty-six billion, one hundred thirty-five million, three hundred thousand, two hundred sixty-one".