91843433438 has 16 divisors (see below), whose sum is σ = 139832358144. Its totient is φ = 45232755480.

The previous prime is 91843433401. The next prime is 91843433447. The reversal of 91843433438 is 83433434819.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2720981 + ... + 2754527.

It is an arithmetic number, because the mean of its divisors is an integer number (8739522384).

Almost surely, 2^91843433438 is an apocalyptic number.

91843433438 is a deficient number, since it is larger than the sum of its proper divisors (47988924706).

91843433438 is a wasteful number, since it uses less digits than its factorization.

91843433438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54047.

The product of its digits is 2985984, while the sum is 50.

The spelling of 91843433438 in words is "ninety-one billion, eight hundred forty-three million, four hundred thirty-three thousand, four hundred thirty-eight".