91065830621 has 8 divisors (see below), whose sum is σ = 91725505344. Its totient is φ = 90406900800.

The previous prime is 91065830617. The next prime is 91065830627. The reversal of 91065830621 is 12603856019.

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 91065830621 - 2² = 91065830617 is a prime.

It is a super-2 number, since 2×91065830621² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91065830627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60341 + ... + 431013.

It is an arithmetic number, because the mean of its divisors is an integer number (11465688168).

Almost surely, 2^91065830621 is an apocalyptic number.

It is an amenable number.

91065830621 is a deficient number, since it is larger than the sum of its proper divisors (659674723).

91065830621 is a wasteful number, since it uses less digits than its factorization.

91065830621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372451.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 91065830621 in words is "ninety-one billion, sixty-five million, eight hundred thirty thousand, six hundred twenty-one".