40443121104 has 80 divisors (see below), whose sum is σ = 106080067584. Its totient is φ = 13274800000.

The previous prime is 40443121021. The next prime is 40443121109. The reversal of 40443121104 is 40112134404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443121109) 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, 2934229 + ... + 2947979.

Almost surely, 2^40443121104 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 40443121104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53040033792).

40443121104 is an abundant number, since it is smaller than the sum of its proper divisors (65636946480).

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

40443121104 is a wasteful number, since it uses less digits than its factorization.

40443121104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14696 (or 14690 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 40443121104 its reverse (40112134404), we get a palindrome (80555255508).

The spelling of 40443121104 in words is "forty billion, four hundred forty-three million, one hundred twenty-one thousand, one hundred four".