631323036340 has 24 divisors (see below), whose sum is σ = 1325867749920. Its totient is φ = 252512191008.

The previous prime is 631323036329. The next prime is 631323036473. The reversal of 631323036340 is 43630323136.

631323036340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 631323036296 and 631323036305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757722 + ... + 1355281.

It is an arithmetic number, because the mean of its divisors is an integer number (55244489580).

Almost surely, 2^631323036340 is an apocalyptic number.

It is an amenable number.

631323036340 is an abundant number, since it is smaller than the sum of its proper divisors (694544713580).

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

631323036340 is a wasteful number, since it uses less digits than its factorization.

631323036340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127951 (or 2127949 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 34.

Adding to 631323036340 its reverse (43630323136), we get a palindrome (674953359476).

The spelling of 631323036340 in words is "six hundred thirty-one billion, three hundred twenty-three million, thirty-six thousand, three hundred forty".