15685710012 has 144 divisors (see below), whose sum is σ = 45755953152. Its totient is φ = 4438177920.

The previous prime is 15685709999. The next prime is 15685710067. The reversal of 15685710012 is 21001758651.

15685710012 is a `hidden beast` number, since 15 + 68 + 571 + 0 + 0 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 14429733 + ... + 14430819.

Almost surely, 2^15685710012 is an apocalyptic number.

15685710012 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 15685710012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22877976576).

15685710012 is an abundant number, since it is smaller than the sum of its proper divisors (30070243140).

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

15685710012 is a wasteful number, since it uses less digits than its factorization.

15685710012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 15685710012 in words is "fifteen billion, six hundred eighty-five million, seven hundred ten thousand, twelve".