45170784849991 has 2 divisors, whose sum is σ = 45170784849992. Its totient is φ = 45170784849990.

The previous prime is 45170784849989. The next prime is 45170784850021. The reversal of 45170784849991 is 19994848707154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45170784849991 - 2¹ = 45170784849989 is a prime.

Together with 45170784849989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45170784849391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22585392424995 + 22585392424996.

It is an arithmetic number, because the mean of its divisors is an integer number (22585392424996).

Almost surely, 2^{45170784849991} is an apocalyptic number.

45170784849991 is a deficient number, since it is larger than the sum of its proper divisors (1).

45170784849991 is an equidigital number, since it uses as much as digits as its factorization.

45170784849991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 731566080, while the sum is 76.

The spelling of 45170784849991 in words is "forty-five trillion, one hundred seventy billion, seven hundred eighty-four million, eight hundred forty-nine thousand, nine hundred ninety-one".