15520542120 has 96 divisors (see below), whose sum is σ = 51614877600. Its totient is φ = 4042555776.

The previous prime is 15520542091. The next prime is 15520542127. The reversal of 15520542120 is 2124502551.

15520542120 is a `hidden beast` number, since 15 + 5 + 205 + 421 + 20 = 666.

15520542120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×15520542120⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (15520542127) by changing a digit.

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, 485830 + ... + 516789.

It is an arithmetic number, because the mean of its divisors is an integer number (537654975).

Almost surely, 2^15520542120 is an apocalyptic number.

15520542120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15520542120 is an abundant number, since it is smaller than the sum of its proper divisors (36094335480).

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

15520542120 is a wasteful number, since it uses less digits than its factorization.

15520542120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002679 (or 1002672 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 15520542120 in words is "fifteen billion, five hundred twenty million, five hundred forty-two thousand, one hundred twenty".