1631546616 has 128 divisors (see below), whose sum is σ = 4829184000. Its totient is φ = 449504640.

The previous prime is 1631546603. The next prime is 1631546629. The reversal of 1631546616 is 6166451361.

It is an interprime number because it is at equal distance from previous prime (1631546603) and next prime (1631546629).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2723485 + ... + 2724083.

It is an arithmetic number, because the mean of its divisors is an integer number (37728000).

Almost surely, 2^1631546616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631546616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2414592000).

1631546616 is an abundant number, since it is smaller than the sum of its proper divisors (3197637384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1631546616 is a wasteful number, since it uses less digits than its factorization.

1631546616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1165 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 1631546616 is about 40392.4079004954. The cubic root of 1631546616 is about 1177.2440269225.

Adding to 1631546616 its reverse (6166451361), we get a palindrome (7797997977).

The spelling of 1631546616 in words is "one billion, six hundred thirty-one million, five hundred forty-six thousand, six hundred sixteen".