1616163536 has 20 divisors (see below), whose sum is σ = 3372187812. Its totient is φ = 745921536.

The previous prime is 1616163529. The next prime is 1616163553. The reversal of 1616163536 is 6353616161.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 916878400 + 699285136 = 30280^2 + 26444^2 .

It is a super-2 number, since 2×1616163536² = 5223969150192046592, 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 1616163536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3884801 + ... + 3885216.

Almost surely, 2^1616163536 is an apocalyptic number.

1616163536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1616163536 is an abundant number, since it is smaller than the sum of its proper divisors (1756024276).

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

1616163536 is a wasteful number, since it uses less digits than its factorization.

1616163536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7770038 (or 7770032 counting only the distinct ones).

The product of its digits is 58320, while the sum is 38.

The square root of 1616163536 is about 40201.5364880498. The cubic root of 1616163536 is about 1173.5324454046.

Adding to 1616163536 its reverse (6353616161), we get a palindrome (7969779697).

It can be divided in two parts, 16161 and 63536, that added together give a palindrome (79697).

The spelling of 1616163536 in words is "one billion, six hundred sixteen million, one hundred sixty-three thousand, five hundred thirty-six".