109891471840 has 96 divisors (see below), whose sum is σ = 271108918080. Its totient is φ = 42013999104.

The previous prime is 109891471819. The next prime is 109891471847. The reversal of 109891471840 is 48174198901.

It is a super-2 number, since 2×109891471840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109891471847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5248272 + ... + 5269168.

It is an arithmetic number, because the mean of its divisors is an integer number (2824051230).

Almost surely, 2^109891471840 is an apocalyptic number.

109891471840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109891471840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135554459040).

109891471840 is an abundant number, since it is smaller than the sum of its proper divisors (161217446240).

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

109891471840 is a wasteful number, since it uses less digits than its factorization.

109891471840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22364 (or 22356 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 52.

The spelling of 109891471840 in words is "one hundred nine billion, eight hundred ninety-one million, four hundred seventy-one thousand, eight hundred forty".