91493886434804 has 24 divisors (see below), whose sum is σ = 182987998390848. Its totient is φ = 39211617288960.

The previous prime is 91493886434803. The next prime is 91493886434831. The reversal of 91493886434804 is 40843468839419.

It is a super-2 number, since 2×91493886434804² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91493886434803) 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, 30092324 + ... + 32992964.

It is an arithmetic number, because the mean of its divisors is an integer number (7624499932952).

Almost surely, 2^{91493886434804} is an apocalyptic number.

It is an amenable number.

91493886434804 is an abundant number, since it is smaller than the sum of its proper divisors (91494111956044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91493886434804 is a wasteful number, since it uses less digits than its factorization.

91493886434804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027175 (or 4027173 counting only the distinct ones).

The product of its (nonzero) digits is 573308928, while the sum is 71.

The spelling of 91493886434804 in words is "ninety-one trillion, four hundred ninety-three billion, eight hundred eighty-six million, four hundred thirty-four thousand, eight hundred four".