1616549844 has 96 divisors (see below), whose sum is σ = 4688683776. Its totient is φ = 422092800.

The previous prime is 1616549827. The next prime is 1616549861. The reversal of 1616549844 is 4489456161.

It is an interprime number because it is at equal distance from previous prime (1616549827) and next prime (1616549861).

It is a super-2 number, since 2×1616549844² = 5226466796272848672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616549793 and 1616549802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102964 + ... + 117620.

It is an arithmetic number, because the mean of its divisors is an integer number (48840456).

Almost surely, 2^1616549844 is an apocalyptic number.

1616549844 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616549844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2344341888).

1616549844 is an abundant number, since it is smaller than the sum of its proper divisors (3072133932).

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

1616549844 is a wasteful number, since it uses less digits than its factorization.

1616549844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14785 (or 14783 counting only the distinct ones).

The product of its digits is 829440, while the sum is 48.

The square root of 1616549844 is about 40206.3408432053. The cubic root of 1616549844 is about 1173.6259402451.

The spelling of 1616549844 in words is "one billion, six hundred sixteen million, five hundred forty-nine thousand, eight hundred forty-four".