16781256006 has 16 divisors (see below), whose sum is σ = 33593401344. Its totient is φ = 5588603784.

The previous prime is 16781256001. The next prime is 16781256059. The reversal of 16781256006 is 60065218761.

It is a super-2 number, since 2×16781256006² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16781256001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279990 + ... + 1293033.

It is an arithmetic number, because the mean of its divisors is an integer number (2099587584).

Almost surely, 2^16781256006 is an apocalyptic number.

16781256006 is an abundant number, since it is smaller than the sum of its proper divisors (16812145338).

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

16781256006 is a wasteful number, since it uses less digits than its factorization.

16781256006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574115.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 16781256006 in words is "sixteen billion, seven hundred eighty-one million, two hundred fifty-six thousand, six".