15425425728 has 448 divisors, whose sum is σ = 52340256000. Its totient is φ = 4421910528.

The previous prime is 15425425723. The next prime is 15425425751. The reversal of 15425425728 is 82752452451.

15425425728 is a `hidden beast` number, since 1 + 54 + 2 + 542 + 57 + 2 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15425425723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16185700 + ... + 16186652.

Almost surely, 2^15425425728 is an apocalyptic number.

15425425728 is a gapful number since it is divisible by the number (18) 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 15425425728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26170128000).

15425425728 is an abundant number, since it is smaller than the sum of its proper divisors (36914830272).

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

15425425728 is a wasteful number, since it uses less digits than its factorization.

15425425728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039 (or 1023 counting only the distinct ones).

The product of its digits is 896000, while the sum is 45.

The spelling of 15425425728 in words is "fifteen billion, four hundred twenty-five million, four hundred twenty-five thousand, seven hundred twenty-eight".