1631661368 has 16 divisors (see below), whose sum is σ = 3064132680. Its totient is φ = 814559328.

The previous prime is 1631661349. The next prime is 1631661391. The reversal of 1631661368 is 8631661361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153455 + ... + 163742.

Almost surely, 2^1631661368 is an apocalyptic number.

It is an amenable number.

1631661368 is a deficient number, since it is larger than the sum of its proper divisors (1432471312).

1631661368 is a wasteful number, since it uses less digits than its factorization.

1631661368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317846 (or 317842 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 1631661368 is about 40393.8283404780. The cubic root of 1631661368 is about 1177.2716260807.

The spelling of 1631661368 in words is "one billion, six hundred thirty-one million, six hundred sixty-one thousand, three hundred sixty-eight".