631655563151 has 2 divisors, whose sum is σ = 631655563152. Its totient is φ = 631655563150.

The previous prime is 631655563139. The next prime is 631655563169. The reversal of 631655563151 is 151365556136.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631655563151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631655563096 and 631655563105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631655563111) 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 as a sum of consecutive naturals, namely, 315827781575 + 315827781576.

It is an arithmetic number, because the mean of its divisors is an integer number (315827781576).

Almost surely, 2^631655563151 is an apocalyptic number.

631655563151 is a deficient number, since it is larger than the sum of its proper divisors (1).

631655563151 is an equidigital number, since it uses as much as digits as its factorization.

631655563151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215000, while the sum is 47.

The spelling of 631655563151 in words is "six hundred thirty-one billion, six hundred fifty-five million, five hundred sixty-three thousand, one hundred fifty-one".