1600191616 has 16 divisors (see below), whose sum is σ = 3187881990. Its totient is φ = 800095744.

The previous prime is 1600191601. The next prime is 1600191653. The reversal of 1600191616 is 6161910061.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1332542016 + 267649600 = 36504^2 + 16360^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×1600191616² = 5121226415833382912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6250621 + ... + 6250876.

Almost surely, 2^1600191616 is an apocalyptic number.

1600191616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1600191616 is a deficient number, since it is larger than the sum of its proper divisors (1587690374).

1600191616 is an equidigital number, since it uses as much as digits as its factorization.

1600191616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12501511 (or 12501499 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1600191616 is about 40002.3951282920. The cubic root of 1600191616 is about 1169.6537841366.

The spelling of 1600191616 in words is "one billion, six hundred million, one hundred ninety-one thousand, six hundred sixteen".