91347913980 has 72 divisors (see below), whose sum is σ = 284577576192. Its totient is φ = 23701078656.

The previous prime is 91347913957. The next prime is 91347913981. The reversal of 91347913980 is 8931974319.

It is a happy number.

91347913980 is a `hidden beast` number, since 91 + 3 + 479 + 1 + 3 + 9 + 80 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91347913981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6851292 + ... + 6864611.

It is an arithmetic number, because the mean of its divisors is an integer number (3952466336).

Almost surely, 2^91347913980 is an apocalyptic number.

91347913980 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91347913980 is an abundant number, since it is smaller than the sum of its proper divisors (193229662212).

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

91347913980 is a wasteful number, since it uses less digits than its factorization.

91347913980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13715955 (or 13715950 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 91347913980 in words is "ninety-one billion, three hundred forty-seven million, nine hundred thirteen thousand, nine hundred eighty".