15534513012 has 144 divisors (see below), whose sum is σ = 39034638720. Its totient is φ = 4806998784.

The previous prime is 15534512999. The next prime is 15534513037. The reversal of 15534513012 is 21031543551.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78855298 + ... + 78855494.

It is an arithmetic number, because the mean of its divisors is an integer number (271073880).

Almost surely, 2^15534513012 is an apocalyptic number.

15534513012 is a gapful number since it is divisible by the number (12) 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 15534513012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19517319360).

15534513012 is an abundant number, since it is smaller than the sum of its proper divisors (23500125708).

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

15534513012 is a wasteful number, since it uses less digits than its factorization.

15534513012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 15534513012 in words is "fifteen billion, five hundred thirty-four million, five hundred thirteen thousand, twelve".