2381532686172 has 54 divisors (see below), whose sum is σ = 6353502632568. Its totient is φ = 752062949424.

The previous prime is 2381532686111. The next prime is 2381532686173. The reversal of 2381532686172 is 2716862351832.

2381532686172 is a `hidden beast` number, since 2 + 3 + 8 + 15 + 3 + 2 + 6 + 8 + 617 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2381532686173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 91612608 + ... + 91638599.

Almost surely, 2^{2381532686172} is an apocalyptic number.

It is an amenable number.

2381532686172 is an abundant number, since it is smaller than the sum of its proper divisors (3971969946396).

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

2381532686172 is a wasteful number, since it uses less digits than its factorization.

2381532686172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183251255 (or 183251231 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The spelling of 2381532686172 in words is "two trillion, three hundred eighty-one billion, five hundred thirty-two million, six hundred eighty-six thousand, one hundred seventy-two".