1631643104825 has 12 divisors (see below), whose sum is σ = 2023406860860. Its totient is φ = 1305205186560.

The previous prime is 1631643104821. The next prime is 1631643104893. The reversal of 1631643104825 is 5284013461361.

It can be written as a sum of positive squares in 6 ways, for example, as 507137682496 + 1124505422329 = 712136^2 + 1060427^2 .

It is not a de Polignac number, because 1631643104825 - 2² = 1631643104821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1631643104821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2427224 + ... + 3025673.

It is an arithmetic number, because the mean of its divisors is an integer number (168617238405).

Almost surely, 2^{1631643104825} is an apocalyptic number.

It is an amenable number.

1631643104825 is a deficient number, since it is larger than the sum of its proper divisors (391763756035).

1631643104825 is a wasteful number, since it uses less digits than its factorization.

1631643104825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5464876 (or 5464871 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 1631643104825 in words is "one trillion, six hundred thirty-one billion, six hundred forty-three million, one hundred four thousand, eight hundred twenty-five".