181873572504772 has 12 divisors (see below), whose sum is σ = 318815478281916. Its totient is φ = 90783435852800.

The previous prime is 181873572504751. The next prime is 181873572504781. The reversal of 181873572504772 is 277405275378181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 141407867382016 + 40465705122756 = 11891504^2 + 6361266^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181873572504698 and 181873572504707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38337597229 + ... + 38337601972.

It is an arithmetic number, because the mean of its divisors is an integer number (26567956523493).

Almost surely, 2^{181873572504772} is an apocalyptic number.

It is an amenable number.

181873572504772 is a deficient number, since it is larger than the sum of its proper divisors (136941905777144).

181873572504772 is a wasteful number, since it uses less digits than its factorization.

181873572504772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76675199798 (or 76675199796 counting only the distinct ones).

The product of its (nonzero) digits is 184396800, while the sum is 67.

The spelling of 181873572504772 in words is "one hundred eighty-one trillion, eight hundred seventy-three billion, five hundred seventy-two million, five hundred four thousand, seven hundred seventy-two".