2856689821408 has 24 divisors (see below), whose sum is σ = 5624280679248. Its totient is φ = 1428301077504.

The previous prime is 2856689821379. The next prime is 2856689821411. The reversal of 2856689821408 is 8041289866582.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297841 + ... + 2408752.

It is an arithmetic number, because the mean of its divisors is an integer number (234345028302).

Almost surely, 2^{2856689821408} is an apocalyptic number.

It is an amenable number.

2856689821408 is a deficient number, since it is larger than the sum of its proper divisors (2767590857840).

2856689821408 is a wasteful number, since it uses less digits than its factorization.

2856689821408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739586 (or 2739578 counting only the distinct ones).

The product of its (nonzero) digits is 106168320, while the sum is 67.

The spelling of 2856689821408 in words is "two trillion, eight hundred fifty-six billion, six hundred eighty-nine million, eight hundred twenty-one thousand, four hundred eight".