2685779855136 has 96 divisors (see below), whose sum is σ = 8952599537280. Its totient is φ = 767365671168.

The previous prime is 2685779855119. The next prime is 2685779855159. The reversal of 2685779855136 is 6315589775862.

2685779855136 is a `hidden beast` number, since 2 + 68 + 5 + 7 + 7 + 9 + 8 + 551 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222032631 + ... + 222044726.

It is an arithmetic number, because the mean of its divisors is an integer number (93256245180).

Almost surely, 2^{2685779855136} is an apocalyptic number.

It is an amenable number.

2685779855136 is an abundant number, since it is smaller than the sum of its proper divisors (6266819682144).

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

2685779855136 is a wasteful number, since it uses less digits than its factorization.

2685779855136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444077383 (or 444077369 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 72.

The spelling of 2685779855136 in words is "two trillion, six hundred eighty-five billion, seven hundred seventy-nine million, eight hundred fifty-five thousand, one hundred thirty-six".