91843834819 has 16 divisors (see below), whose sum is σ = 103466962944. Its totient is φ = 80768491200.

The previous prime is 91843834777. The next prime is 91843834829.

91843834819 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 91843834819 - 2¹⁷ = 91843703747 is a prime.

It is a super-2 number, since 2×91843834819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91843834829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814207 + ... + 920119.

It is an arithmetic number, because the mean of its divisors is an integer number (6466685184).

Almost surely, 2^91843834819 is an apocalyptic number.

91843834819 is a deficient number, since it is larger than the sum of its proper divisors (11623128125).

91843834819 is a wasteful number, since it uses less digits than its factorization.

91843834819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108498.

The product of its digits is 5971968, while the sum is 58.

The spelling of 91843834819 in words is "ninety-one billion, eight hundred forty-three million, eight hundred thirty-four thousand, eight hundred nineteen".