10405421440 has 64 divisors (see below), whose sum is σ = 26184726000. Its totient is φ = 3943102464.

The previous prime is 10405421431. The next prime is 10405421443. The reversal of 10405421440 is 4412450401.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10405421443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415695 + ... + 440014.

Almost surely, 2^10405421440 is an apocalyptic number.

10405421440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10405421440 is an abundant number, since it is smaller than the sum of its proper divisors (15779304560).

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

10405421440 is an equidigital number, since it uses as much as digits as its factorization.

10405421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855747 (or 855735 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 10405421440 its reverse (4412450401), we get a palindrome (14817871841).

The spelling of 10405421440 in words is "ten billion, four hundred five million, four hundred twenty-one thousand, four hundred forty".