91673542072 has 32 divisors (see below), whose sum is σ = 199663693920. Its totient is φ = 38644583040.

The previous prime is 91673542043. The next prime is 91673542097. The reversal of 91673542072 is 27024537619.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13414843 + ... + 13421674.

It is an arithmetic number, because the mean of its divisors is an integer number (6239490435).

Almost surely, 2^91673542072 is an apocalyptic number.

It is an amenable number.

91673542072 is an abundant number, since it is smaller than the sum of its proper divisors (107990151848).

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

91673542072 is a wasteful number, since it uses less digits than its factorization.

91673542072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26836591 (or 26836587 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 46.

The spelling of 91673542072 in words is "ninety-one billion, six hundred seventy-three million, five hundred forty-two thousand, seventy-two".