1812581753161 has 8 divisors (see below), whose sum is σ = 1854788199264. Its totient is φ = 1770377733600.

The previous prime is 1812581753113. The next prime is 1812581753183. The reversal of 1812581753161 is 1613571852181.

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

It is not a de Polignac number, because 1812581753161 - 2⁹ = 1812581752649 is a prime.

It is a super-2 number, since 2×1812581753161² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1812581753461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950730 + ... + 2128156.

It is an arithmetic number, because the mean of its divisors is an integer number (231848524908).

Almost surely, 2^{1812581753161} is an apocalyptic number.

It is an amenable number.

1812581753161 is a deficient number, since it is larger than the sum of its proper divisors (42206446103).

1812581753161 is a wasteful number, since it uses less digits than its factorization.

1812581753161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213271.

The product of its digits is 403200, while the sum is 49.

The spelling of 1812581753161 in words is "one trillion, eight hundred twelve billion, five hundred eighty-one million, seven hundred fifty-three thousand, one hundred sixty-one".