1616394017 has 30 divisors (see below), whose sum is σ = 2006686818. Its totient is φ = 1297429056.

The previous prime is 1616393993. The next prime is 1616394019. The reversal of 1616394017 is 7104936161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1521312016 + 95082001 = 39004^2 + 9751^2 .

It is not a de Polignac number, because 1616394017 - 2¹⁸ = 1616131873 is a prime.

It is a super-2 number, since 2×1616394017² = 5225459236386792578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616394019) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8122484 + ... + 8122682.

Almost surely, 2^1616394017 is an apocalyptic number.

1616394017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1616394017 is a deficient number, since it is larger than the sum of its proper divisors (390292801).

1616394017 is an frugal number, since it uses more digits than its factorization.

1616394017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1616394017 is about 40204.4029553978. The cubic root of 1616394017 is about 1173.5882285538.

The spelling of 1616394017 in words is "one billion, six hundred sixteen million, three hundred ninety-four thousand, seventeen".