2156135442156 has 30 divisors (see below), whose sum is σ = 5636563949940. Its totient is φ = 718711813944.

The previous prime is 2156135442151. The next prime is 2156135442233. The reversal of 2156135442156 is 6512445316512.

2156135442156 is a `hidden beast` number, since 2 + 1 + 5 + 613 + 5 + 4 + 4 + 21 + 5 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (2156135442151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3327369186 + ... + 3327369833.

It is an arithmetic number, because the mean of its divisors is an integer number (187885464998).

Almost surely, 2^{2156135442156} is an apocalyptic number.

It is an amenable number.

2156135442156 is an abundant number, since it is smaller than the sum of its proper divisors (3480428507784).

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

2156135442156 is a wasteful number, since it uses less digits than its factorization.

2156135442156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6654739035 (or 6654739024 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 2156135442156 in words is "two trillion, one hundred fifty-six billion, one hundred thirty-five million, four hundred forty-two thousand, one hundred fifty-six".