1812573621601 has 8 divisors (see below), whose sum is σ = 1819845244224. Its totient is φ = 1805302398000.

The previous prime is 1812573621589. The next prime is 1812573621653. The reversal of 1812573621601 is 1061263752181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1812573621601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812573621301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11877555 + ... + 12029191.

It is an arithmetic number, because the mean of its divisors is an integer number (227480655528).

Almost surely, 2^{1812573621601} is an apocalyptic number.

It is an amenable number.

1812573621601 is a deficient number, since it is larger than the sum of its proper divisors (7271622623).

1812573621601 is a wasteful number, since it uses less digits than its factorization.

1812573621601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199511.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 1812573621601 in words is "one trillion, eight hundred twelve billion, five hundred seventy-three million, six hundred twenty-one thousand, six hundred one".