43125685091 has 2 divisors, whose sum is σ = 43125685092. Its totient is φ = 43125685090.

The previous prime is 43125685073. The next prime is 43125685117. The reversal of 43125685091 is 19058652134.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43125685091 is a prime.

It is not a weakly prime, because it can be changed into another prime (43125675091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21562842545 + 21562842546.

It is an arithmetic number, because the mean of its divisors is an integer number (21562842546).

Almost surely, 2^43125685091 is an apocalyptic number.

43125685091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43125685091 is an equidigital number, since it uses as much as digits as its factorization.

43125685091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 43125685091 in words is "forty-three billion, one hundred twenty-five million, six hundred eighty-five thousand, ninety-one".