1616486544 has 120 divisors (see below), whose sum is σ = 4708136160. Its totient is φ = 536917248.

The previous prime is 1616486513. The next prime is 1616486549. The reversal of 1616486544 is 4456846161.

1616486544 is a `hidden beast` number, since 1 + 61 + 6 + 48 + 6 + 544 = 666.

It is a super-2 number, since 2×1616486544² = 5226057493866127872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1616486544.

It is not an unprimeable number, because it can be changed into a prime (1616486549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1473004 + ... + 1474100.

It is an arithmetic number, because the mean of its divisors is an integer number (39234468).

Almost surely, 2^1616486544 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 1616486544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354068080).

1616486544 is an abundant number, since it is smaller than the sum of its proper divisors (3091649616).

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

1616486544 is a wasteful number, since it uses less digits than its factorization.

1616486544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499 (or 1481 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 1616486544 is about 40205.5536462315. The cubic root of 1616486544 is about 1173.6106213048.

The spelling of 1616486544 in words is "one billion, six hundred sixteen million, four hundred eighty-six thousand, five hundred forty-four".