18049451453568 has 64 divisors (see below), whose sum is σ = 53270950480800. Its totient is φ = 6016483816704.

The previous prime is 18049451453543. The next prime is 18049451453639. The reversal of 18049451453568 is 86535415494081.

It is a happy number.

18049451453568 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 9 + 4 + 5 + 14 + 53 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611317646 + ... + 2611324557.

Almost surely, 2^{18049451453568} is an apocalyptic number.

18049451453568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18049451453568 is an abundant number, since it is smaller than the sum of its proper divisors (35221499027232).

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

18049451453568 is an equidigital number, since it uses as much as digits as its factorization.

18049451453568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222642226 (or 5222642208 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 63.

The spelling of 18049451453568 in words is "eighteen trillion, forty-nine billion, four hundred fifty-one million, four hundred fifty-three thousand, five hundred sixty-eight".