91428450913980 has 120 divisors (see below), whose sum is σ = 286827149180880. Its totient is φ = 24379839613440.

The previous prime is 91428450913963. The next prime is 91428450913993. The reversal of 91428450913980 is 8931905482419.

91428450913980 is a `hidden beast` number, since 9 + 1 + 4 + 2 + 8 + 450 + 91 + 3 + 98 + 0 = 666.

91428450913980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35646435 + ... + 38125125.

It is an arithmetic number, because the mean of its divisors is an integer number (2390226243174).

Almost surely, 2^{91428450913980} is an apocalyptic number.

91428450913980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91428450913980 is an abundant number, since it is smaller than the sum of its proper divisors (195398698266900).

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

91428450913980 is a wasteful number, since it uses less digits than its factorization.

91428450913980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501481 (or 2501470 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 91428450913980 in words is "ninety-one trillion, four hundred twenty-eight billion, four hundred fifty million, nine hundred thirteen thousand, nine hundred eighty".