15440468440 has 64 divisors (see below), whose sum is σ = 34898623200. Its totient is φ = 6148251648.

The previous prime is 15440468383. The next prime is 15440468441. The reversal of 15440468440 is 4486404451.

15440468440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 15440468393 and 15440468402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15440468441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12686712 + ... + 12687928.

Almost surely, 2^15440468440 is an apocalyptic number.

15440468440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15440468440 is an abundant number, since it is smaller than the sum of its proper divisors (19458154760).

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

15440468440 is a wasteful number, since it uses less digits than its factorization.

15440468440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404 (or 2400 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 40.

The spelling of 15440468440 in words is "fifteen billion, four hundred forty million, four hundred sixty-eight thousand, four hundred forty".