616321253544 has 64 divisors (see below), whose sum is σ = 1578035236800. Its totient is φ = 200484619776.

The previous prime is 616321253531. The next prime is 616321253563. The reversal of 616321253544 is 445352123616.

It is a junction number, because it is equal to n+sod(n) for n = 616321253496 and 616321253505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 900642 + ... + 1429614.

It is an arithmetic number, because the mean of its divisors is an integer number (24656800575).

Almost surely, 2^616321253544 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 616321253544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789017618400).

616321253544 is an abundant number, since it is smaller than the sum of its proper divisors (961713983256).

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

616321253544 is a wasteful number, since it uses less digits than its factorization.

616321253544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530154 (or 530150 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 616321253544 in words is "six hundred sixteen billion, three hundred twenty-one million, two hundred fifty-three thousand, five hundred forty-four".