631771771432 has 8 divisors (see below), whose sum is σ = 1184572071450. Its totient is φ = 315885885712.

The previous prime is 631771771429. The next prime is 631771771441. The reversal of 631771771432 is 234177177136.

It can be written as a sum of positive squares in only one way, i.e., 594956139556 + 36815631876 = 771334^2 + 191874^2 .

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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39485735707 + ... + 39485735722.

Almost surely, 2^631771771432 is an apocalyptic number.

It is an amenable number.

631771771432 is a deficient number, since it is larger than the sum of its proper divisors (552800300018).

631771771432 is a wasteful number, since it uses less digits than its factorization.

631771771432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78971471435 (or 78971471431 counting only the distinct ones).

The product of its digits is 1037232, while the sum is 49.

The spelling of 631771771432 in words is "six hundred thirty-one billion, seven hundred seventy-one million, seven hundred seventy-one thousand, four hundred thirty-two".