1818296727408 has 480 divisors, whose sum is σ = 6384720101760. Its totient is φ = 471009853440.

The previous prime is 1818296727397. The next prime is 1818296727469. The reversal of 1818296727408 is 8047276928181.

1818296727408 is a `hidden beast` number, since 1 + 81 + 82 + 9 + 6 + 72 + 7 + 408 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 229087216 + ... + 229095152.

It is an arithmetic number, because the mean of its divisors is an integer number (13301500212).

Almost surely, 2^{1818296727408} is an apocalyptic number.

1818296727408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818296727408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3192360050880).

1818296727408 is an abundant number, since it is smaller than the sum of its proper divisors (4566423374352).

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

1818296727408 is a wasteful number, since it uses less digits than its factorization.

1818296727408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8465 (or 8456 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 63.

The spelling of 1818296727408 in words is "one trillion, eight hundred eighteen billion, two hundred ninety-six million, seven hundred twenty-seven thousand, four hundred eight".