43655841091 has 2 divisors, whose sum is σ = 43655841092. Its totient is φ = 43655841090.

The previous prime is 43655841077. The next prime is 43655841107. The reversal of 43655841091 is 19014855634.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43655841091 - 2⁵ = 43655841059 is a prime.

It is a super-2 number, since 2×43655841091² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43655841001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21827920545 + 21827920546.

It is an arithmetic number, because the mean of its divisors is an integer number (21827920546).

Almost surely, 2^43655841091 is an apocalyptic number.

43655841091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43655841091 is an equidigital number, since it uses as much as digits as its factorization.

43655841091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 46.

The spelling of 43655841091 in words is "forty-three billion, six hundred fifty-five million, eight hundred forty-one thousand, ninety-one".