10421559640 has 96 divisors (see below), whose sum is σ = 25319026800. Its totient is φ = 3858831360.

The previous prime is 10421559619. The next prime is 10421559649. The reversal of 10421559640 is 4695512401.

It is a self number, because there is not a number n which added to its sum of digits gives 10421559640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10421559649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 697771 + ... + 712549.

Almost surely, 2^10421559640 is an apocalyptic number.

10421559640 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 10421559640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12659513400).

10421559640 is an abundant number, since it is smaller than the sum of its proper divisors (14897467160).

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

10421559640 is a wasteful number, since it uses less digits than its factorization.

10421559640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14885 (or 14864 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 10421559640 in words is "ten billion, four hundred twenty-one million, five hundred fifty-nine thousand, six hundred forty".