15530121504 has 144 divisors (see below), whose sum is σ = 46543442400. Its totient is φ = 4898423808.

The previous prime is 15530121463. The next prime is 15530121521. The reversal of 15530121504 is 40512103551.

15530121504 is a `hidden beast` number, since 1 + 5 + 5 + 30 + 121 + 504 = 666.

15530121504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8858292 + ... + 8860044.

It is an arithmetic number, because the mean of its divisors is an integer number (323218350).

Almost surely, 2^15530121504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15530121504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23271721200).

15530121504 is an abundant number, since it is smaller than the sum of its proper divisors (31013320896).

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

15530121504 is a wasteful number, since it uses less digits than its factorization.

15530121504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The spelling of 15530121504 in words is "fifteen billion, five hundred thirty million, one hundred twenty-one thousand, five hundred four".