15775803711856 has 20 divisors (see below), whose sum is σ = 30565869161152. Its totient is φ = 7887837476736.

The previous prime is 15775803711839. The next prime is 15775803711859. The reversal of 15775803711856 is 65811730857751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15775803711859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1970325 + ... + 5952628.

Almost surely, 2^{15775803711856} is an apocalyptic number.

15775803711856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15775803711856 is a deficient number, since it is larger than the sum of its proper divisors (14790065449296).

15775803711856 is a wasteful number, since it uses less digits than its factorization.

15775803711856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8047408 (or 8047402 counting only the distinct ones).

The product of its (nonzero) digits is 49392000, while the sum is 64.

The spelling of 15775803711856 in words is "fifteen trillion, seven hundred seventy-five billion, eight hundred three million, seven hundred eleven thousand, eight hundred fifty-six".