631020633461 has 4 divisors (see below), whose sum is σ = 631022238924. Its totient is φ = 631019028000.

The previous prime is 631020633431. The next prime is 631020633469. The reversal of 631020633461 is 164336020136.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 160981500625 + 470039132836 = 401225^2 + 685594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631020633461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631020633469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228011 + ... + 1146311.

It is an arithmetic number, because the mean of its divisors is an integer number (157755559731).

Almost surely, 2^631020633461 is an apocalyptic number.

It is an amenable number.

631020633461 is a deficient number, since it is larger than the sum of its proper divisors (1605463).

631020633461 is an equidigital number, since it uses as much as digits as its factorization.

631020633461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605462.

The product of its (nonzero) digits is 46656, while the sum is 35.

Adding to 631020633461 its reverse (164336020136), we get a palindrome (795356653597).

The spelling of 631020633461 in words is "six hundred thirty-one billion, twenty million, six hundred thirty-three thousand, four hundred sixty-one".