631955026216 has 8 divisors (see below), whose sum is σ = 1184915674170. Its totient is φ = 315977513104.

The previous prime is 631955026189. The next prime is 631955026229. The reversal of 631955026216 is 612620559136.

It can be written as a sum of positive squares in only one way, i.e., 451780245316 + 180174780900 = 672146^2 + 424470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39497189131 + ... + 39497189146.

Almost surely, 2^631955026216 is an apocalyptic number.

It is an amenable number.

631955026216 is a deficient number, since it is larger than the sum of its proper divisors (552960647954).

631955026216 is a wasteful number, since it uses less digits than its factorization.

631955026216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78994378283 (or 78994378279 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 631955026216 in words is "six hundred thirty-one billion, nine hundred fifty-five million, twenty-six thousand, two hundred sixteen".