15432345240 has 128 divisors (see below), whose sum is σ = 49897391040. Its totient is φ = 3795757056.

The previous prime is 15432345233. The next prime is 15432345277. The reversal of 15432345240 is 4254323451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2513214 + ... + 2519346.

Almost surely, 2^15432345240 is an apocalyptic number.

15432345240 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 15432345240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24948695520).

15432345240 is an abundant number, since it is smaller than the sum of its proper divisors (34465045800).

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

15432345240 is a wasteful number, since it uses less digits than its factorization.

15432345240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773 (or 7769 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 15432345240 its reverse (4254323451), we get a palindrome (19686668691).

The spelling of 15432345240 in words is "fifteen billion, four hundred thirty-two million, three hundred forty-five thousand, two hundred forty".