1616619444 has 24 divisors (see below), whose sum is σ = 4115031648. Its totient is φ = 489884640.

The previous prime is 1616619401. The next prime is 1616619457. The reversal of 1616619444 is 4449166161.

It is a super-2 number, since 2×1616619444² = 5226916853437738272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616619396 and 1616619405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6123427 + ... + 6123690.

It is an arithmetic number, because the mean of its divisors is an integer number (171459652).

Almost surely, 2^1616619444 is an apocalyptic number.

It is an amenable number.

1616619444 is an abundant number, since it is smaller than the sum of its proper divisors (2498412204).

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

1616619444 is a wasteful number, since it uses less digits than its factorization.

1616619444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12247135 (or 12247133 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1616619444 is about 40207.2063690080. The cubic root of 1616619444 is about 1173.6427833577.

The spelling of 1616619444 in words is "one billion, six hundred sixteen million, six hundred nineteen thousand, four hundred forty-four".