18109774440810 has 192 divisors, whose sum is σ = 51765725531520. Its totient is φ = 4365392279040.

The previous prime is 18109774440799. The next prime is 18109774440811. The reversal of 18109774440810 is 1804447790181.

18109774440810 is a `hidden beast` number, since 1 + 81 + 0 + 97 + 74 + 4 + 408 + 1 + 0 = 666.

It is a super-2 number, since 2×18109774440810² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18109774440811) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 15642081 + ... + 16759899.

It is an arithmetic number, because the mean of its divisors is an integer number (269613153810).

Almost surely, 2^{18109774440810} is an apocalyptic number.

18109774440810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18109774440810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25882862765760).

18109774440810 is an abundant number, since it is smaller than the sum of its proper divisors (33655951090710).

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

18109774440810 is a wasteful number, since it uses less digits than its factorization.

18109774440810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118133 (or 1118130 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 18109774440810 in words is "eighteen trillion, one hundred nine billion, seven hundred seventy-four million, four hundred forty thousand, eight hundred ten".