618820557444144 has 120 divisors (see below), whose sum is σ = 1988713593796800. Its totient is φ = 177651834664320.

The previous prime is 618820557444121. The next prime is 618820557444203. The reversal of 618820557444144 is 441444755028816.

618820557444144 is a `hidden beast` number, since 6 + 1 + 8 + 8 + 2 + 0 + 5 + 574 + 44 + 14 + 4 = 666.

It is a super-2 number, since 2×618820557444144² (a number of 30 digits) contains 22 as substring.

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, 10280747374 + ... + 10280807565.

It is an arithmetic number, because the mean of its divisors is an integer number (16572613281640).

Almost surely, 2^{618820557444144} is an apocalyptic number.

It is an amenable number.

618820557444144 is an abundant number, since it is smaller than the sum of its proper divisors (1369893036352656).

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

618820557444144 is a wasteful number, since it uses less digits than its factorization.

618820557444144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20561554983 (or 20561554974 counting only the distinct ones).

The product of its (nonzero) digits is 137625600, while the sum is 63.

The spelling of 618820557444144 in words is "six hundred eighteen trillion, eight hundred twenty billion, five hundred fifty-seven million, four hundred forty-four thousand, one hundred forty-four".