1881438188132 has 12 divisors (see below), whose sum is σ = 3486194289900. Its totient is φ = 885382676736.

The previous prime is 1881438188107. The next prime is 1881438188137. The reversal of 1881438188132 is 2318818341881.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1438406840896 + 443031347236 = 1199336^2 + 665606^2 .

It is a super-2 number, since 2×1881438188132² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1881438188137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13834104257 + ... + 13834104392.

It is an arithmetic number, because the mean of its divisors is an integer number (290516190825).

Almost surely, 2^{1881438188132} is an apocalyptic number.

It is an amenable number.

1881438188132 is a deficient number, since it is larger than the sum of its proper divisors (1604756101768).

1881438188132 is a wasteful number, since it uses less digits than its factorization.

1881438188132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27668208670 (or 27668208668 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 56.

The spelling of 1881438188132 in words is "one trillion, eight hundred eighty-one billion, four hundred thirty-eight million, one hundred eighty-eight thousand, one hundred thirty-two".