91129353420 has 192 divisors, whose sum is σ = 296110080000. Its totient is φ = 20509198080.

The previous prime is 91129353397. The next prime is 91129353431. The reversal of 91129353420 is 2435392119.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30385081 + ... + 30388079.

It is an arithmetic number, because the mean of its divisors is an integer number (1542240000).

Almost surely, 2^91129353420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91129353420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148055040000).

91129353420 is an abundant number, since it is smaller than the sum of its proper divisors (204980726580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91129353420 is a wasteful number, since it uses less digits than its factorization.

91129353420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4106 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 91129353420 in words is "ninety-one billion, one hundred twenty-nine million, three hundred fifty-three thousand, four hundred twenty".