15556328240 has 80 divisors (see below), whose sum is σ = 38246052096. Its totient is φ = 5874892800.

The previous prime is 15556328237. The next prime is 15556328267. The reversal of 15556328240 is 4282365551.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25184 + ... + 178176.

Almost surely, 2^15556328240 is an apocalyptic number.

15556328240 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 15556328240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19123026048).

15556328240 is an abundant number, since it is smaller than the sum of its proper divisors (22689723856).

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

15556328240 is a wasteful number, since it uses less digits than its factorization.

15556328240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153078 (or 153072 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 15556328240 in words is "fifteen billion, five hundred fifty-six million, three hundred twenty-eight thousand, two hundred forty".