91437843140 has 48 divisors (see below), whose sum is σ = 231000873600. Its totient is φ = 29700110592.

The previous prime is 91437843139. The next prime is 91437843199. The reversal of 91437843140 is 4134873419.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91437843091 and 91437843100.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17184905 + ... + 17190224.

It is an arithmetic number, because the mean of its divisors is an integer number (4812518200).

Almost surely, 2^91437843140 is an apocalyptic number.

It is an amenable number.

91437843140 is an abundant number, since it is smaller than the sum of its proper divisors (139563030460).

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

91437843140 is a wasteful number, since it uses less digits than its factorization.

91437843140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34375164 (or 34375162 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 91437843140 in words is "ninety-one billion, four hundred thirty-seven million, eight hundred forty-three thousand, one hundred forty".