631126969201 has 2 divisors, whose sum is σ = 631126969202. Its totient is φ = 631126969200.

The previous prime is 631126969199. The next prime is 631126969267. The reversal of 631126969201 is 102969621136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364846200625 + 266280768576 = 604025^2 + 516024^2 .

It is a cyclic number.

It is not a de Polignac number, because 631126969201 - 2¹ = 631126969199 is a prime.

Together with 631126969199, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (631126969301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315563484600 + 315563484601.

It is an arithmetic number, because the mean of its divisors is an integer number (315563484601).

Almost surely, 2^631126969201 is an apocalyptic number.

It is an amenable number.

631126969201 is a deficient number, since it is larger than the sum of its proper divisors (1).

631126969201 is an equidigital number, since it uses as much as digits as its factorization.

631126969201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 631126969201 in words is "six hundred thirty-one billion, one hundred twenty-six million, nine hundred sixty-nine thousand, two hundred one".