15782856816 has 20 divisors (see below), whose sum is σ = 40772380232. Its totient is φ = 5260952256.

The previous prime is 15782856769. The next prime is 15782856853. The reversal of 15782856816 is 61865828751.

15782856816 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 3 ways as a sum of consecutive naturals, for example, 164404711 + ... + 164404806.

Almost surely, 2^15782856816 is an apocalyptic number.

15782856816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15782856816 is an abundant number, since it is smaller than the sum of its proper divisors (24989523416).

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

15782856816 is a wasteful number, since it uses less digits than its factorization.

15782856816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328809528 (or 328809522 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 57.

The spelling of 15782856816 in words is "fifteen billion, seven hundred eighty-two million, eight hundred fifty-six thousand, eight hundred sixteen".