91444042752 has 44 divisors (see below), whose sum is σ = 243731721096. Its totient is φ = 30481346560.

The previous prime is 91444042727. The next prime is 91444042759. The reversal of 91444042752 is 25724044419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91444042759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14880399 + ... + 14886542.

Almost surely, 2^91444042752 is an apocalyptic number.

It is an amenable number.

91444042752 is an abundant number, since it is smaller than the sum of its proper divisors (152287678344).

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

91444042752 is a wasteful number, since it uses less digits than its factorization.

91444042752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29766964 (or 29766946 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 91444042752 in words is "ninety-one billion, four hundred forty-four million, forty-two thousand, seven hundred fifty-two".