1811073771816 has 64 divisors (see below), whose sum is σ = 4604833195200. Its totient is φ = 593406571008.

The previous prime is 1811073771797. The next prime is 1811073771817. The reversal of 1811073771816 is 6181773701181.

It is not an unprimeable number, because it can be changed into a prime (1811073771817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17928586 + ... + 18029318.

It is an arithmetic number, because the mean of its divisors is an integer number (71950518675).

Almost surely, 2^{1811073771816} is an apocalyptic number.

It is an amenable number.

1811073771816 is an abundant number, since it is smaller than the sum of its proper divisors (2793759423384).

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

1811073771816 is a wasteful number, since it uses less digits than its factorization.

1811073771816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113498 (or 113494 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 51.

The spelling of 1811073771816 in words is "one trillion, eight hundred eleven billion, seventy-three million, seven hundred seventy-one thousand, eight hundred sixteen".