181672133748 has 48 divisors (see below), whose sum is σ = 486260046720. Its totient is φ = 51713357184.

The previous prime is 181672133743. The next prime is 181672133771. The reversal of 181672133748 is 847331276181.

It is a self number, because there is not a number n which added to its sum of digits gives 181672133748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181672133743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3997411 + ... + 4042602.

It is an arithmetic number, because the mean of its divisors is an integer number (10130417640).

Almost surely, 2^181672133748 is an apocalyptic number.

It is an amenable number.

181672133748 is an abundant number, since it is smaller than the sum of its proper divisors (304587912972).

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

181672133748 is a wasteful number, since it uses less digits than its factorization.

181672133748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040296 (or 8040294 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 181672133748 in words is "one hundred eighty-one billion, six hundred seventy-two million, one hundred thirty-three thousand, seven hundred forty-eight".