1600161616 has 20 divisors (see below), whose sum is σ = 3135150900. Its totient is φ = 791090432.

The previous prime is 1600161613. The next prime is 1600161631. The reversal of 1600161616 is 6161610061.

It can be written as a sum of positive squares in 2 ways, for example, as 892814400 + 707347216 = 29880^2 + 26596^2 .

1600161616 is a modest number, since divided by 161616 gives 1600 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600161611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560431 + ... + 563278.

It is an arithmetic number, because the mean of its divisors is an integer number (156757545).

Almost surely, 2^1600161616 is an apocalyptic number.

1600161616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1600161616 is a deficient number, since it is larger than the sum of its proper divisors (1534989284).

1600161616 is a wasteful number, since it uses less digits than its factorization.

1600161616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123806 (or 1123800 counting only the distinct ones).

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

The square root of 1600161616 is about 40002.0201489875. The cubic root of 1600161616 is about 1169.6464746302.

Adding to 1600161616 its reverse (6161610061), we get a palindrome (7761771677).

It can be divided in two parts, 1600 and 161616, that added together give a square (163216 = 404²).

The spelling of 1600161616 in words is "one billion, six hundred million, one hundred sixty-one thousand, six hundred sixteen".