1631616016 has 10 divisors (see below), whose sum is σ = 3161256062. Its totient is φ = 815808000.

The previous prime is 1631616011. The next prime is 1631616023. The reversal of 1631616016 is 6106161361.

It can be written as a sum of positive squares in only one way, i.e., 823919616 + 807696400 = 28704^2 + 28420^2 .

It is not an unprimeable number, because it can be changed into a prime (1631616011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50987985 + ... + 50988016.

Almost surely, 2^1631616016 is an apocalyptic number.

1631616016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1631616016 is a deficient number, since it is larger than the sum of its proper divisors (1529640046).

1631616016 is a wasteful number, since it uses less digits than its factorization.

1631616016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101976009 (or 101976003 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1631616016 is about 40393.2669636909. The cubic root of 1631616016 is about 1177.2607185647.

Adding to 1631616016 its reverse (6106161361), we get a palindrome (7737777377).

The spelling of 1631616016 in words is "one billion, six hundred thirty-one million, six hundred sixteen thousand, sixteen".