91943070912 has 672 divisors, whose sum is σ = 350225441280. Its totient is φ = 22326312960.

The previous prime is 91943070911. The next prime is 91943070917. The reversal of 91943070912 is 21907034919.

It is a tau number, because it is divible by the number of its divisors (672).

It is not an unprimeable number, because it can be changed into a prime (91943070911) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 148534539 + ... + 148535157.

Almost surely, 2^91943070912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91943070912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175112720640).

91943070912 is an abundant number, since it is smaller than the sum of its proper divisors (258282370368).

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

91943070912 is a wasteful number, since it uses less digits than its factorization.

91943070912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The spelling of 91943070912 in words is "ninety-one billion, nine hundred forty-three million, seventy thousand, nine hundred twelve".