91528372671 has 8 divisors (see below), whose sum is σ = 122304873264. Its totient is φ = 60885393600.

The previous prime is 91528372667. The next prime is 91528372721. The reversal of 91528372671 is 17627382519.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91528372671 - 2² = 91528372667 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91528372171) by changing a digit.

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, 33378780 + ... + 33381521.

It is an arithmetic number, because the mean of its divisors is an integer number (15288109158).

Almost surely, 2^91528372671 is an apocalyptic number.

91528372671 is a deficient number, since it is larger than the sum of its proper divisors (30776500593).

91528372671 is a wasteful number, since it uses less digits than its factorization.

91528372671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66760761.

The product of its digits is 1270080, while the sum is 51.

The spelling of 91528372671 in words is "ninety-one billion, five hundred twenty-eight million, three hundred seventy-two thousand, six hundred seventy-one".