201625638156 has 24 divisors (see below), whose sum is σ = 522733136240. Its totient is φ = 67208546016.

The previous prime is 201625638121. The next prime is 201625638187. The reversal of 201625638156 is 651836526102.

201625638156 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 2 + 5 + 638 + 1 + 5 + 6 = 666.

201625638156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 933451921 + ... + 933452136.

Almost surely, 2^201625638156 is an apocalyptic number.

It is an amenable number.

201625638156 is an abundant number, since it is smaller than the sum of its proper divisors (321107498084).

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

201625638156 is a wasteful number, since it uses less digits than its factorization.

201625638156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866904070 (or 1866904062 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 201625638156 in words is "two hundred one billion, six hundred twenty-five million, six hundred thirty-eight thousand, one hundred fifty-six".