1816672766181 has 64 divisors (see below), whose sum is σ = 3265419225600. Its totient is φ = 870778331136.

The previous prime is 1816672766131. The next prime is 1816672766191.

1816672766181 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1816672766181 - 2²² = 1816668571877 is a prime.

It is a super-2 number, since 2×1816672766181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816672766101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6614376 + ... + 6883553.

It is an arithmetic number, because the mean of its divisors is an integer number (51022175400).

Almost surely, 2^{1816672766181} is an apocalyptic number.

It is an amenable number.

1816672766181 is a deficient number, since it is larger than the sum of its proper divisors (1448746459419).

1816672766181 is a wasteful number, since it uses less digits than its factorization.

1816672766181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13497998.

The product of its digits is 8128512, while the sum is 60.

The spelling of 1816672766181 in words is "one trillion, eight hundred sixteen billion, six hundred seventy-two million, seven hundred sixty-six thousand, one hundred eighty-one".