41687663749 has 2 divisors, whose sum is σ = 41687663750. Its totient is φ = 41687663748.

The previous prime is 41687663711. The next prime is 41687663791. The reversal of 41687663749 is 94736678614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41296336225 + 391327524 = 203215^2 + 19782^2 .

It is a cyclic number.

It is not a de Polignac number, because 41687663749 - 2¹⁵ = 41687630981 is a prime.

It is a super-2 number, since 2×41687663749² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41687673749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20843831874 + 20843831875.

It is an arithmetic number, because the mean of its divisors is an integer number (20843831875).

Almost surely, 2^41687663749 is an apocalyptic number.

It is an amenable number.

41687663749 is a deficient number, since it is larger than the sum of its proper divisors (1).

41687663749 is an equidigital number, since it uses as much as digits as its factorization.

41687663749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 61.

The spelling of 41687663749 in words is "forty-one billion, six hundred eighty-seven million, six hundred sixty-three thousand, seven hundred forty-nine".