91200380409 has 8 divisors (see below), whose sum is σ = 135111674720. Its totient is φ = 60800253588.

The previous prime is 91200380407. The next prime is 91200380489. The reversal of 91200380409 is 90408300219.

It is not a de Polignac number, because 91200380409 - 2¹ = 91200380407 is a prime.

It is a super-2 number, since 2×91200380409² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91200380407) 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, 1688895907 + ... + 1688895960.

It is an arithmetic number, because the mean of its divisors is an integer number (16888959340).

Almost surely, 2^91200380409 is an apocalyptic number.

It is an amenable number.

91200380409 is a deficient number, since it is larger than the sum of its proper divisors (43911294311).

91200380409 is a wasteful number, since it uses less digits than its factorization.

91200380409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377791876 (or 3377791870 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 91200380409 in words is "ninety-one billion, two hundred million, three hundred eighty thousand, four hundred nine".