181740400672 has 24 divisors (see below), whose sum is σ = 370139395500. Its totient is φ = 87736744704.

The previous prime is 181740400669. The next prime is 181740400711. The reversal of 181740400672 is 276004047181.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 177851132176 + 3889268496 = 421724^2 + 62364^2 .

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, 97919547 + ... + 97921402.

Almost surely, 2^181740400672 is an apocalyptic number.

It is an amenable number.

181740400672 is an abundant number, since it is smaller than the sum of its proper divisors (188398994828).

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

181740400672 is a wasteful number, since it uses less digits than its factorization.

181740400672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195840988 (or 195840980 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The spelling of 181740400672 in words is "one hundred eighty-one billion, seven hundred forty million, four hundred thousand, six hundred seventy-two".