1818695987712 has 320 divisors, whose sum is σ = 5428565049600. Its totient is φ = 601172213760.

The previous prime is 1818695987671. The next prime is 1818695987743. The reversal of 1818695987712 is 2177895968181.

1818695987712 is a `hidden beast` number, since 1 + 8 + 18 + 6 + 9 + 598 + 7 + 7 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1479817114 + ... + 1479818342.

It is an arithmetic number, because the mean of its divisors is an integer number (16964265780).

Almost surely, 2^{1818695987712} is an apocalyptic number.

1818695987712 is a gapful number since it is divisible by the number (12) 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 1818695987712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2714282524800).

1818695987712 is an abundant number, since it is smaller than the sum of its proper divisors (3609869061888).

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

1818695987712 is a wasteful number, since it uses less digits than its factorization.

1818695987712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064 (or 2042 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 72.

The spelling of 1818695987712 in words is "one trillion, eight hundred eighteen billion, six hundred ninety-five million, nine hundred eighty-seven thousand, seven hundred twelve".