1663616356 has 24 divisors (see below), whose sum is σ = 2923131456. Its totient is φ = 828444960.

The previous prime is 1663616347. The next prime is 1663616363. The reversal of 1663616356 is 6536163661.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2011215 + ... + 2012041.

It is an arithmetic number, because the mean of its divisors is an integer number (121797144).

Almost surely, 2^1663616356 is an apocalyptic number.

It is an amenable number.

1663616356 is a deficient number, since it is larger than the sum of its proper divisors (1259515100).

1663616356 is a wasteful number, since it uses less digits than its factorization.

1663616356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259 (or 2257 counting only the distinct ones).

The product of its digits is 349920, while the sum is 43.

The square root of 1663616356 is about 40787.4534140096. The cubic root of 1663616356 is about 1184.9073511451.

The spelling of 1663616356 in words is "one billion, six hundred sixty-three million, six hundred sixteen thousand, three hundred fifty-six".