1631605412 has 12 divisors (see below), whose sum is σ = 2856327516. Its totient is φ = 815511840.

The previous prime is 1631605357. The next prime is 1631605421. The reversal of 1631605412 is 2145061361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 704159296 + 927446116 = 26536^2 + 30454^2 .

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, 59843 + ... + 82730.

It is an arithmetic number, because the mean of its divisors is an integer number (238027293).

Almost surely, 2^1631605412 is an apocalyptic number.

It is an amenable number.

1631605412 is a deficient number, since it is larger than the sum of its proper divisors (1224722104).

1631605412 is a wasteful number, since it uses less digits than its factorization.

1631605412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145438 (or 145436 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1631605412 is about 40393.1357039782. The cubic root of 1631605412 is about 1177.2581681894.

Adding to 1631605412 its reverse (2145061361), we get a palindrome (3776666773).

The spelling of 1631605412 in words is "one billion, six hundred thirty-one million, six hundred five thousand, four hundred twelve".