1616511663 has 24 divisors (see below), whose sum is σ = 2516717840. Its totient is φ = 993928320.

The previous prime is 1616511661. The next prime is 1616511679. The reversal of 1616511663 is 3661156161.

It is not a de Polignac number, because 1616511663 - 2¹ = 1616511661 is a prime.

It is a super-2 number, since 2×1616511663² = 5226219913230051138, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616511661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149328 + ... + 159786.

Almost surely, 2^1616511663 is an apocalyptic number.

1616511663 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1616511663 is a deficient number, since it is larger than the sum of its proper divisors (900206177).

1616511663 is a wasteful number, since it uses less digits than its factorization.

1616511663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11799 (or 11796 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1616511663 is about 40205.8660272354. The cubic root of 1616511663 is about 1173.6167002857.

The spelling of 1616511663 in words is "one billion, six hundred sixteen million, five hundred eleven thousand, six hundred sixty-three".