631591702434 has 48 divisors (see below), whose sum is σ = 1706117849280. Its totient is φ = 164049792480.

The previous prime is 631591702381. The next prime is 631591702439. The reversal of 631591702434 is 434207195136.

631591702434 is a `hidden beast` number, since 6 + 3 + 1 + 591 + 7 + 0 + 24 + 34 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 631591702434.

It is not an unprimeable number, because it can be changed into a prime (631591702439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227845549 + ... + 227848320.

It is an arithmetic number, because the mean of its divisors is an integer number (35544121860).

Almost surely, 2^631591702434 is an apocalyptic number.

631591702434 is an abundant number, since it is smaller than the sum of its proper divisors (1074526146846).

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

631591702434 is a wasteful number, since it uses less digits than its factorization.

631591702434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455693895 (or 455693892 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

It can be divided in two parts, 631591 and 702434, that added together give a square (1334025 = 1155²).

The spelling of 631591702434 in words is "six hundred thirty-one billion, five hundred ninety-one million, seven hundred two thousand, four hundred thirty-four".