15434459440 has 40 divisors (see below), whose sum is σ = 35908514208. Its totient is φ = 6169758720.

The previous prime is 15434459407. The next prime is 15434459441. The reversal of 15434459440 is 4495443451.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×15434459440² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15434459441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62125 + ... + 186355.

Almost surely, 2^15434459440 is an apocalyptic number.

15434459440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15434459440 is an abundant number, since it is smaller than the sum of its proper divisors (20474054768).

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

15434459440 is a wasteful number, since it uses less digits than its factorization.

15434459440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125797 (or 125791 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 15434459440 in words is "fifteen billion, four hundred thirty-four million, four hundred fifty-nine thousand, four hundred forty".