15451728438 has 64 divisors (see below), whose sum is σ = 33032448000. Its totient is φ = 4810216320.

The previous prime is 15451728427. The next prime is 15451728469. The reversal of 15451728438 is 83482715451.

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, 642963 + ... + 666561.

It is an arithmetic number, because the mean of its divisors is an integer number (516132000).

Almost surely, 2^15451728438 is an apocalyptic number.

15451728438 is an abundant number, since it is smaller than the sum of its proper divisors (17580719562).

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

15451728438 is a wasteful number, since it uses less digits than its factorization.

15451728438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23757.

The product of its digits is 1075200, while the sum is 48.

The spelling of 15451728438 in words is "fifteen billion, four hundred fifty-one million, seven hundred twenty-eight thousand, four hundred thirty-eight".