15542488520 has 128 divisors (see below), whose sum is σ = 39060403200. Its totient is φ = 5526506496.

The previous prime is 15542488517. The next prime is 15542488529. The reversal of 15542488520 is 2588424551.

It is not an unprimeable number, because it can be changed into a prime (15542488529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7041257 + ... + 7043463.

It is an arithmetic number, because the mean of its divisors is an integer number (305159400).

Almost surely, 2^15542488520 is an apocalyptic number.

15542488520 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 15542488520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19530201600).

15542488520 is an abundant number, since it is smaller than the sum of its proper divisors (23517914680).

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

15542488520 is a wasteful number, since it uses less digits than its factorization.

15542488520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2727 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 44.

The spelling of 15542488520 in words is "fifteen billion, five hundred forty-two million, four hundred eighty-eight thousand, five hundred twenty".