1631789146 has 16 divisors (see below), whose sum is σ = 2692053504. Its totient is φ = 737108784.

The previous prime is 1631789123. The next prime is 1631789147. The reversal of 1631789146 is 6419871361.

It is a junction number, because it is equal to n+sod(n) for n = 1631789096 and 1631789105.

It is not an unprimeable number, because it can be changed into a prime (1631789147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666450 + ... + 668893.

It is an arithmetic number, because the mean of its divisors is an integer number (168253344).

Almost surely, 2^1631789146 is an apocalyptic number.

1631789146 is a deficient number, since it is larger than the sum of its proper divisors (1060264358).

1631789146 is a wasteful number, since it uses less digits than its factorization.

1631789146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335405.

The product of its digits is 217728, while the sum is 46.

The square root of 1631789146 is about 40395.4099620242. The cubic root of 1631789146 is about 1177.3023566171.

The spelling of 1631789146 in words is "one billion, six hundred thirty-one million, seven hundred eighty-nine thousand, one hundred forty-six".