43649012191 has 2 divisors, whose sum is σ = 43649012192. Its totient is φ = 43649012190.

The previous prime is 43649012117. The next prime is 43649012219. The reversal of 43649012191 is 19121094634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43649012191 - 2¹¹ = 43649010143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43649012111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21824506095 + 21824506096.

It is an arithmetic number, because the mean of its divisors is an integer number (21824506096).

Almost surely, 2^43649012191 is an apocalyptic number.

43649012191 is a deficient number, since it is larger than the sum of its proper divisors (1).

43649012191 is an equidigital number, since it uses as much as digits as its factorization.

43649012191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 43649012191 in words is "forty-three billion, six hundred forty-nine million, twelve thousand, one hundred ninety-one".