1812500128772 has 12 divisors (see below), whose sum is σ = 3174893192016. Its totient is φ = 905387788200.

The previous prime is 1812500128771. The next prime is 1812500128781. The reversal of 1812500128772 is 2778210052181.

It is not an unprimeable number, because it can be changed into a prime (1812500128771) 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, 215564318 + ... + 215572725.

It is an arithmetic number, because the mean of its divisors is an integer number (264574432668).

Almost surely, 2^{1812500128772} is an apocalyptic number.

It is an amenable number.

1812500128772 is a deficient number, since it is larger than the sum of its proper divisors (1362393063244).

1812500128772 is a wasteful number, since it uses less digits than its factorization.

1812500128772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431138098 (or 431138096 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 44.

The spelling of 1812500128772 in words is "one trillion, eight hundred twelve billion, five hundred million, one hundred twenty-eight thousand, seven hundred seventy-two".