616121412 has 72 divisors (see below), whose sum is σ = 1543153920. Its totient is φ = 191270400.

The previous prime is 616121381. The next prime is 616121413. The reversal of 616121412 is 214121616.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (616121413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 349389 + ... + 351147.

Almost surely, 2^616121412 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 616121412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771576960).

616121412 is an abundant number, since it is smaller than the sum of its proper divisors (927032508).

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

616121412 is a wasteful number, since it uses less digits than its factorization.

616121412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1901 (or 1882 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 616121412 is about 24821.7930859154. The cubic root of 616121412 is about 850.9200703902.

The spelling of 616121412 in words is "six hundred sixteen million, one hundred twenty-one thousand, four hundred twelve".