91790955602321 has 4 divisors (see below), whose sum is σ = 91798651678272. Its totient is φ = 91783259526372.

The previous prime is 91790955602273. The next prime is 91790955602383. The reversal of 91790955602321 is 12320655909719.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91790955602321 - 2¹⁴ = 91790955585937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91790955602221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3848020085 + ... + 3848043938.

It is an arithmetic number, because the mean of its divisors is an integer number (22949662919568).

Almost surely, 2^{91790955602321} is an apocalyptic number.

It is an amenable number.

91790955602321 is a deficient number, since it is larger than the sum of its proper divisors (7696075951).

91790955602321 is a wasteful number, since it uses less digits than its factorization.

91790955602321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696075950.

The product of its (nonzero) digits is 9185400, while the sum is 59.

The spelling of 91790955602321 in words is "ninety-one trillion, seven hundred ninety billion, nine hundred fifty-five million, six hundred two thousand, three hundred twenty-one".