91019896024 has 64 divisors (see below), whose sum is σ = 179050798080. Its totient is φ = 43328544000.

The previous prime is 91019896021. The next prime is 91019896063. The reversal of 91019896024 is 42069891019.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91019896021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21309009 + ... + 21313279.

It is an arithmetic number, because the mean of its divisors is an integer number (2797668720).

Almost surely, 2^91019896024 is an apocalyptic number.

It is an amenable number.

91019896024 is a deficient number, since it is larger than the sum of its proper divisors (88030902056).

91019896024 is a wasteful number, since it uses less digits than its factorization.

91019896024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5872 (or 5868 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The spelling of 91019896024 in words is "ninety-one billion, nineteen million, eight hundred ninety-six thousand, twenty-four".