91506289072 has 20 divisors (see below), whose sum is σ = 193411020456. Its totient is φ = 41593767680.

The previous prime is 91506289003. The next prime is 91506289109. The reversal of 91506289072 is 27098260519.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 259960873 + ... + 259961224.

Almost surely, 2^91506289072 is an apocalyptic number.

It is an amenable number.

91506289072 is an abundant number, since it is smaller than the sum of its proper divisors (101904731384).

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

91506289072 is a wasteful number, since it uses less digits than its factorization.

91506289072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519922116 (or 519922110 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 91506289072 in words is "ninety-one billion, five hundred six million, two hundred eighty-nine thousand, seventy-two".