4518619397856 has 144 divisors (see below), whose sum is σ = 13169613326688. Its totient is φ = 1468757606400.

The previous prime is 4518619397779. The next prime is 4518619397879. The reversal of 4518619397856 is 6587939168154.

4518619397856 is a `hidden beast` number, since 4 + 5 + 186 + 1 + 9 + 397 + 8 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24551616 + ... + 24734976.

It is an arithmetic number, because the mean of its divisors is an integer number (91455648102).

Almost surely, 2^{4518619397856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4518619397856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6584806663344).

4518619397856 is an abundant number, since it is smaller than the sum of its proper divisors (8650993928832).

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

4518619397856 is a wasteful number, since it uses less digits than its factorization.

4518619397856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185505 (or 185494 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 72.

The spelling of 4518619397856 in words is "four trillion, five hundred eighteen billion, six hundred nineteen million, three hundred ninety-seven thousand, eight hundred fifty-six".