1518738621120 has 1680 divisors, whose sum is σ = 6591675879360. Its totient is φ = 324898947072.

The previous prime is 1518738621119. The next prime is 1518738621163. The reversal of 1518738621120 is 211268378151.

1518738621120 is a `hidden beast` number, since 1 + 5 + 1 + 8 + 7 + 3 + 8 + 621 + 12 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1680).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 5645868346 + ... + 5645868614.

Almost surely, 2^{1518738621120} is an apocalyptic number.

1518738621120 is a gapful number since it is divisible by the number (10) 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 1518738621120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3295837939680).

1518738621120 is an abundant number, since it is smaller than the sum of its proper divisors (5072937258240).

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

1518738621120 is a wasteful number, since it uses less digits than its factorization.

1518738621120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The spelling of 1518738621120 in words is "one trillion, five hundred eighteen billion, seven hundred thirty-eight million, six hundred twenty-one thousand, one hundred twenty".