10040421040 has 80 divisors (see below), whose sum is σ = 25160889600. Its totient is φ = 3704103936.

The previous prime is 10040421031. The next prime is 10040421043. The reversal of 10040421040 is 4012404001.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (10040421043) 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, 1493206 + ... + 1499914.

It is an arithmetic number, because the mean of its divisors is an integer number (314511120).

Almost surely, 2^10040421040 is an apocalyptic number.

10040421040 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 10040421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12580444800).

10040421040 is an abundant number, since it is smaller than the sum of its proper divisors (15120468560).

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

10040421040 is a wasteful number, since it uses less digits than its factorization.

10040421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8174 (or 8168 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 10040421040 its reverse (4012404001), we get a palindrome (14052825041).

The spelling of 10040421040 in words is "ten billion, forty million, four hundred twenty-one thousand, forty".