181406835132 has 48 divisors (see below), whose sum is σ = 449713155360. Its totient is φ = 56805864192.

The previous prime is 181406835091. The next prime is 181406835217. The reversal of 181406835132 is 231538604181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7031503 + ... + 7057254.

It is an arithmetic number, because the mean of its divisors is an integer number (9369024070).

Almost surely, 2^181406835132 is an apocalyptic number.

181406835132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181406835132 is an abundant number, since it is smaller than the sum of its proper divisors (268306320228).

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

181406835132 is a wasteful number, since it uses less digits than its factorization.

181406835132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14088830 (or 14088828 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 181406835132 in words is "one hundred eighty-one billion, four hundred six million, eight hundred thirty-five thousand, one hundred thirty-two".