91048443128 has 32 divisors (see below), whose sum is σ = 171206602560. Its totient is φ = 45393469440.

The previous prime is 91048443113. The next prime is 91048443133. The reversal of 91048443128 is 82134484019.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7279376 + ... + 7291872.

It is an arithmetic number, because the mean of its divisors is an integer number (5350206330).

Almost surely, 2^91048443128 is an apocalyptic number.

It is an amenable number.

91048443128 is a deficient number, since it is larger than the sum of its proper divisors (80158159432).

91048443128 is a wasteful number, since it uses less digits than its factorization.

91048443128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15047 (or 15043 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 91048443128 in words is "ninety-one billion, forty-eight million, four hundred forty-three thousand, one hundred twenty-eight".