40434537584261 has 2 divisors, whose sum is σ = 40434537584262. Its totient is φ = 40434537584260.

The previous prime is 40434537584257. The next prime is 40434537584327. The reversal of 40434537584261 is 16248573543404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34357252588036 + 6077284996225 = 5861506^2 + 2465215^2 .

It is a cyclic number.

It is not a de Polignac number, because 40434537584261 - 2² = 40434537584257 is a prime.

It is a super-2 number, since 2×40434537584261² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40434537584197 and 40434537584206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40434537584461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217268792130 + 20217268792131.

It is an arithmetic number, because the mean of its divisors is an integer number (20217268792131).

Almost surely, 2^{40434537584261} is an apocalyptic number.

It is an amenable number.

40434537584261 is a deficient number, since it is larger than the sum of its proper divisors (1).

40434537584261 is an equidigital number, since it uses as much as digits as its factorization.

40434537584261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38707200, while the sum is 56.

The spelling of 40434537584261 in words is "forty trillion, four hundred thirty-four billion, five hundred thirty-seven million, five hundred eighty-four thousand, two hundred sixty-one".