91450404864 has 780 divisors, whose sum is σ = 339530841936. Its totient is φ = 24015273984.

The previous prime is 91450404823. The next prime is 91450404869. The reversal of 91450404864 is 46840405419.

91450404864 is a `hidden beast` number, since 91 + 45 + 0 + 40 + 486 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91450404869) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 392490892 + ... + 392491124.

Almost surely, 2^91450404864 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 91450404864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169765420968).

91450404864 is an abundant number, since it is smaller than the sum of its proper divisors (248080437072).

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

91450404864 is a wasteful number, since it uses less digits than its factorization.

91450404864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 91450404864 in words is "ninety-one billion, four hundred fifty million, four hundred four thousand, eight hundred sixty-four".