631476331362161 has 16 divisors (see below), whose sum is σ = 648768846752208. Its totient is φ = 614195700019200.

The previous prime is 631476331362133. The next prime is 631476331362179. The reversal of 631476331362161 is 161263133674136.

631476331362161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2666493043600 + 628809838318561 = 1632940^2 + 25076081^2 .

It is a cyclic number.

It is not a de Polignac number, because 631476331362161 - 2¹⁰ = 631476331361137 is a prime.

It is a super-2 number, since 2×631476331362161² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (631476331362061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7234936841 + ... + 7235024121.

It is an arithmetic number, because the mean of its divisors is an integer number (40548052922013).

Almost surely, 2^{631476331362161} is an apocalyptic number.

It is an amenable number.

631476331362161 is a deficient number, since it is larger than the sum of its proper divisors (17292515390047).

631476331362161 is a wasteful number, since it uses less digits than its factorization.

631476331362161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153092.

The product of its digits is 5878656, while the sum is 53.

The spelling of 631476331362161 in words is "six hundred thirty-one trillion, four hundred seventy-six billion, three hundred thirty-one million, three hundred sixty-two thousand, one hundred sixty-one".