819856935412 has 6 divisors (see below), whose sum is σ = 1434749636978. Its totient is φ = 409928467704.

The previous prime is 819856935383. The next prime is 819856935433. The reversal of 819856935412 is 214539658918.

819856935412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 741038618896 + 78818316516 = 860836^2 + 280746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102482116923 + ... + 102482116930.

Almost surely, 2^819856935412 is an apocalyptic number.

It is an amenable number.

819856935412 is a deficient number, since it is larger than the sum of its proper divisors (614892701566).

819856935412 is a wasteful number, since it uses less digits than its factorization.

819856935412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204964233857 (or 204964233855 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 61.

The spelling of 819856935412 in words is "eight hundred nineteen billion, eight hundred fifty-six million, nine hundred thirty-five thousand, four hundred twelve".