631781460252 has 18 divisors (see below), whose sum is σ = 1597003135728. Its totient is φ = 210593820072.

The previous prime is 631781460251. The next prime is 631781460347. The reversal of 631781460252 is 252064187136.

631781460252 is a `hidden beast` number, since 6 + 31 + 7 + 8 + 1 + 4 + 602 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 631781460198 and 631781460207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631781460251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8774742468 + ... + 8774742539.

Almost surely, 2^631781460252 is an apocalyptic number.

It is an amenable number.

631781460252 is an abundant number, since it is smaller than the sum of its proper divisors (965221675476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

631781460252 is a wasteful number, since it uses less digits than its factorization.

631781460252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17549485017 (or 17549485012 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 631781460252 in words is "six hundred thirty-one billion, seven hundred eighty-one million, four hundred sixty thousand, two hundred fifty-two".