91435944434 has 16 divisors (see below), whose sum is σ = 137724262200. Its totient is φ = 45528138240.

The previous prime is 91435944433. The next prime is 91435944437. The reversal of 91435944434 is 43444953419.

It can be written as a sum of positive squares in 4 ways, for example, as 86986654225 + 4449290209 = 294935^2 + 66703^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91435944433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 587054 + ... + 726294.

Almost surely, 2^91435944434 is an apocalyptic number.

91435944434 is a deficient number, since it is larger than the sum of its proper divisors (46288317766).

91435944434 is a wasteful number, since it uses less digits than its factorization.

91435944434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140605.

The product of its digits is 3732480, while the sum is 50.

The spelling of 91435944434 in words is "ninety-one billion, four hundred thirty-five million, nine hundred forty-four thousand, four hundred thirty-four".