15720135936 has 72 divisors (see below), whose sum is σ = 41873171424. Its totient is φ = 5235701760.

The previous prime is 15720135901. The next prime is 15720135941. The reversal of 15720135936 is 63953102751.

15720135936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 995946 + ... + 1011606.

Almost surely, 2^15720135936 is an apocalyptic number.

15720135936 is a gapful number since it is divisible by the number (16) 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 15720135936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20936585712).

15720135936 is an abundant number, since it is smaller than the sum of its proper divisors (26153035488).

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

15720135936 is a wasteful number, since it uses less digits than its factorization.

15720135936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16987 (or 16973 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 42.

The spelling of 15720135936 in words is "fifteen billion, seven hundred twenty million, one hundred thirty-five thousand, nine hundred thirty-six".