1616521602 has 16 divisors (see below), whose sum is σ = 3423222432. Its totient is φ = 507144000.

The previous prime is 1616521579. The next prime is 1616521607. The reversal of 1616521602 is 2061256161.

It is a super-2 number, since 2×1616521602² = 5226284179465292808, 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 1616521602.

It is not an unprimeable number, because it can be changed into a prime (1616521607) 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 7 ways as a sum of consecutive naturals, for example, 7924024 + ... + 7924227.

It is an arithmetic number, because the mean of its divisors is an integer number (213951402).

Almost surely, 2^1616521602 is an apocalyptic number.

1616521602 is an abundant number, since it is smaller than the sum of its proper divisors (1806700830).

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

1616521602 is a wasteful number, since it uses less digits than its factorization.

1616521602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15848273.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1616521602 is about 40205.9896284123. The cubic root of 1616521602 is about 1173.6191055786.

Adding to 1616521602 its reverse (2061256161), we get a palindrome (3677777763).

The spelling of 1616521602 in words is "one billion, six hundred sixteen million, five hundred twenty-one thousand, six hundred two".