1616001616 has 30 divisors (see below), whose sum is σ = 3162629486. Its totient is φ = 799920000.

The previous prime is 1616001581. The next prime is 1616001631. The reversal of 1616001616 is 6161006161.

It can be written as a sum of positive squares in 3 ways, for example, as 1474867216 + 141134400 = 38404^2 + 11880^2 .

It is a super-2 number, since 2×1616001616² = 5222922445829222912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 158266 + ... + 168166.

Almost surely, 2^1616001616 is an apocalyptic number.

1616001616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1616001616 is a deficient number, since it is larger than the sum of its proper divisors (1546627870).

1616001616 is an equidigital number, since it uses as much as digits as its factorization.

1616001616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10111 (or 10004 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1616001616 is about 40199.5225842298. The cubic root of 1616001616 is about 1173.4932528527.

Adding to 1616001616 its reverse (6161006161), we get a palindrome (7777007777).

It can be divided in two parts, 161600 and 1616, that multiplied together give a square (261145600 = 16160²).

The spelling of 1616001616 in words is "one billion, six hundred sixteen million, one thousand, six hundred sixteen".