91944060385 has 8 divisors (see below), whose sum is σ = 113314842216. Its totient is φ = 71567268480.

The previous prime is 91944060371. The next prime is 91944060391. The reversal of 91944060385 is 58306044919.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 43633778769 + 48310281616 = 208887^2 + 219796^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91944060385 - 2⁹ = 91944059873 is a prime.

It is a Duffinian 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, 248497276 + ... + 248497645.

It is an arithmetic number, because the mean of its divisors is an integer number (14164355277).

Almost surely, 2^91944060385 is an apocalyptic number.

It is an amenable number.

91944060385 is a deficient number, since it is larger than the sum of its proper divisors (21370781831).

91944060385 is a wasteful number, since it uses less digits than its factorization.

91944060385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496994963.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 91944060385 in words is "ninety-one billion, nine hundred forty-four million, sixty thousand, three hundred eighty-five".