15625128728104 has 384 divisors, whose sum is σ = 37028196403200. Its totient is φ = 6047244656640.

The previous prime is 15625128728101. The next prime is 15625128728159. The reversal of 15625128728104 is 40182782152651.

It is not an unprimeable number, because it can be changed into a prime (15625128728101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 25489606102 + ... + 25489606714.

It is an arithmetic number, because the mean of its divisors is an integer number (96427594800).

Almost surely, 2^{15625128728104} is an apocalyptic number.

15625128728104 is a gapful number since it is divisible by the number (14) 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 15625128728104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18514098201600).

15625128728104 is an abundant number, since it is smaller than the sum of its proper divisors (21403067675096).

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

15625128728104 is a wasteful number, since it uses less digits than its factorization.

15625128728104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 52.

The spelling of 15625128728104 in words is "fifteen trillion, six hundred twenty-five billion, one hundred twenty-eight million, seven hundred twenty-eight thousand, one hundred four".