40400191100 has 72 divisors (see below), whose sum is σ = 88217270400. Its totient is φ = 16059153600.

The previous prime is 40400191099. The next prime is 40400191103. The reversal of 40400191100 is 119100404.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400191103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21499961 + ... + 21501839.

Almost surely, 2^40400191100 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 40400191100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44108635200).

40400191100 is an abundant number, since it is smaller than the sum of its proper divisors (47817079300).

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

40400191100 is a wasteful number, since it uses less digits than its factorization.

40400191100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 40400191100 its reverse (119100404), we get a palindrome (40519291504).

The spelling of 40400191100 in words is "forty billion, four hundred million, one hundred ninety-one thousand, one hundred".