616386533418 has 48 divisors (see below), whose sum is σ = 1364401883520. Its totient is φ = 201019468608.

The previous prime is 616386533401. The next prime is 616386533419. The reversal of 616386533418 is 814335683616.

616386533418 is a `hidden beast` number, since 6 + 1 + 63 + 8 + 6 + 533 + 41 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (616386533419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2289513 + ... + 2544531.

It is an arithmetic number, because the mean of its divisors is an integer number (28425039240).

Almost surely, 2^616386533418 is an apocalyptic number.

616386533418 is an abundant number, since it is smaller than the sum of its proper divisors (748015350102).

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

616386533418 is a wasteful number, since it uses less digits than its factorization.

616386533418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257931 (or 257928 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 616386533418 in words is "six hundred sixteen billion, three hundred eighty-six million, five hundred thirty-three thousand, four hundred eighteen".