631765134 has 144 divisors (see below), whose sum is σ = 1871054640. Its totient is φ = 151441920.

The previous prime is 631765063. The next prime is 631765153. The reversal of 631765134 is 431567136.

631765134 is a `hidden beast` number, since 631 + 7 + 6 + 5 + 13 + 4 = 666.

It is a congruent number.

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 in 71 ways as a sum of consecutive naturals, for example, 123622 + ... + 128630.

It is an arithmetic number, because the mean of its divisors is an integer number (12993435).

Almost surely, 2^631765134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631765134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (935527320).

631765134 is an abundant number, since it is smaller than the sum of its proper divisors (1239289506).

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

631765134 is a wasteful number, since it uses less digits than its factorization.

631765134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5055 (or 5045 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 631765134 is about 25134.9385119598. The cubic root of 631765134 is about 858.0617671151.

The spelling of 631765134 in words is "six hundred thirty-one million, seven hundred sixty-five thousand, one hundred thirty-four".