631651431432 has 32 divisors (see below), whose sum is σ = 1804718376000. Its totient is φ = 180471837504.

The previous prime is 631651431431. The next prime is 631651431443. The reversal of 631651431432 is 234134156136.

It is not an unprimeable number, because it can be changed into a prime (631651431431) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1879914807 + ... + 1879915142.

It is an arithmetic number, because the mean of its divisors is an integer number (56397449250).

Almost surely, 2^631651431432 is an apocalyptic number.

It is an amenable number.

631651431432 is an abundant number, since it is smaller than the sum of its proper divisors (1173066944568).

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

631651431432 is a wasteful number, since it uses less digits than its factorization.

631651431432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3759829965 (or 3759829961 counting only the distinct ones).

The product of its digits is 155520, while the sum is 39.

Adding to 631651431432 its reverse (234134156136), we get a palindrome (865785587568).

The spelling of 631651431432 in words is "six hundred thirty-one billion, six hundred fifty-one million, four hundred thirty-one thousand, four hundred thirty-two".