2256138156 has 12 divisors (see below), whose sum is σ = 5264322392. Its totient is φ = 752046048.

The previous prime is 2256138151. The next prime is 2256138167. The reversal of 2256138156 is 6518316522.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2256138151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94005745 + ... + 94005768.

Almost surely, 2^2256138156 is an apocalyptic number.

It is an amenable number.

2256138156 is an abundant number, since it is smaller than the sum of its proper divisors (3008184236).

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

2256138156 is a wasteful number, since it uses less digits than its factorization.

2256138156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188011520 (or 188011518 counting only the distinct ones).

The product of its digits is 86400, while the sum is 39.

The square root of 2256138156 is about 47498.8226801465. The cubic root of 2256138156 is about 1311.5612091980.

The spelling of 2256138156 in words is "two billion, two hundred fifty-six million, one hundred thirty-eight thousand, one hundred fifty-six".