91994491769044 has 6 divisors (see below), whose sum is σ = 160990360595834. Its totient is φ = 45997245884520.

The previous prime is 91994491769039. The next prime is 91994491769129. The reversal of 91994491769044 is 44096719449919.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 56972122848144 + 35022368920900 = 7547988^2 + 5917970^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11499311471127 + ... + 11499311471134.

Almost surely, 2^{91994491769044} is an apocalyptic number.

It is an amenable number.

91994491769044 is a deficient number, since it is larger than the sum of its proper divisors (68995868826790).

91994491769044 is a wasteful number, since it uses less digits than its factorization.

91994491769044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22998622942265 (or 22998622942263 counting only the distinct ones).

The product of its (nonzero) digits is 634894848, while the sum is 76.

The spelling of 91994491769044 in words is "ninety-one trillion, nine hundred ninety-four billion, four hundred ninety-one million, seven hundred sixty-nine thousand, forty-four".