91082073072 has 20 divisors (see below), whose sum is σ = 235295355560. Its totient is φ = 30360691008.

The previous prime is 91082073067. The next prime is 91082073073. The reversal of 91082073072 is 27037028019.

It is a self number, because there is not a number n which added to its sum of digits gives 91082073072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91082073073) 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, 948771547 + ... + 948771642.

It is an arithmetic number, because the mean of its divisors is an integer number (11764767778).

Almost surely, 2^91082073072 is an apocalyptic number.

It is an amenable number.

91082073072 is an abundant number, since it is smaller than the sum of its proper divisors (144213282488).

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

91082073072 is a wasteful number, since it uses less digits than its factorization.

91082073072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897543200 (or 1897543194 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 91082073072 in words is "ninety-one billion, eighty-two million, seventy-three thousand, seventy-two".