616211431556 has 192 divisors, whose sum is σ = 1374508154880. Its totient is φ = 235516385280.

The previous prime is 616211431531. The next prime is 616211431597. The reversal of 616211431556 is 655134112616.

It is a super-2 number, since 2×616211431556² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 750561626 + ... + 750562446.

It is an arithmetic number, because the mean of its divisors is an integer number (7158896640).

Almost surely, 2^616211431556 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 616211431556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687254077440).

616211431556 is an abundant number, since it is smaller than the sum of its proper divisors (758296723324).

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

616211431556 is a wasteful number, since it uses less digits than its factorization.

616211431556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434 (or 1432 counting only the distinct ones).

The product of its digits is 129600, while the sum is 41.

The spelling of 616211431556 in words is "six hundred sixteen billion, two hundred eleven million, four hundred thirty-one thousand, five hundred fifty-six".