91372773641 has 8 divisors (see below), whose sum is σ = 93115889280. Its totient is φ = 89630365552.

The previous prime is 91372773587. The next prime is 91372773677. The reversal of 91372773641 is 14637727319.

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

It is a cyclic number.

It is not a de Polignac number, because 91372773641 - 2²⁶ = 91305664777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91372773641.

It is not an unprimeable number, because it can be changed into a prime (91372773941) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 87590 + ... + 436368.

It is an arithmetic number, because the mean of its divisors is an integer number (11639486160).

Almost surely, 2^91372773641 is an apocalyptic number.

It is an amenable number.

91372773641 is a deficient number, since it is larger than the sum of its proper divisors (1743115639).

91372773641 is a wasteful number, since it uses less digits than its factorization.

91372773641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353775.

The product of its digits is 1333584, while the sum is 50.

The spelling of 91372773641 in words is "ninety-one billion, three hundred seventy-two million, seven hundred seventy-three thousand, six hundred forty-one".