43086635261 has 2 divisors, whose sum is σ = 43086635262. Its totient is φ = 43086635260.

The previous prime is 43086635243. The next prime is 43086635311. The reversal of 43086635261 is 16253668034.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35520940900 + 7565694361 = 188470^2 + 86981^2 .

It is a cyclic number.

It is not a de Polignac number, because 43086635261 - 2²² = 43082440957 is a prime.

It is a super-2 number, since 2×43086635261² (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 (43086635231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21543317630 + 21543317631.

It is an arithmetic number, because the mean of its divisors is an integer number (21543317631).

Almost surely, 2^43086635261 is an apocalyptic number.

It is an amenable number.

43086635261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43086635261 is an equidigital number, since it uses as much as digits as its factorization.

43086635261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 43086635261 in words is "forty-three billion, eighty-six million, six hundred thirty-five thousand, two hundred sixty-one".