2156656838112 has 144 divisors (see below), whose sum is σ = 7077185256960. Its totient is φ = 610205204736.

The previous prime is 2156656838107. The next prime is 2156656838123. The reversal of 2156656838112 is 2118386566512.

2156656838112 is a `hidden beast` number, since 2 + 1 + 5 + 66 + 568 + 3 + 8 + 1 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4985412 + ... + 5400707.

It is an arithmetic number, because the mean of its divisors is an integer number (49147119840).

Almost surely, 2^{2156656838112} is an apocalyptic number.

It is an amenable number.

2156656838112 is an abundant number, since it is smaller than the sum of its proper divisors (4920528418848).

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

2156656838112 is a wasteful number, since it uses less digits than its factorization.

2156656838112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10386245 (or 10386234 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The spelling of 2156656838112 in words is "two trillion, one hundred fifty-six billion, six hundred fifty-six million, eight hundred thirty-eight thousand, one hundred twelve".