631771720346 has 16 divisors (see below), whose sum is σ = 1021710135264. Its totient is φ = 291256714224.

The previous prime is 631771720331. The next prime is 631771720351. The reversal of 631771720346 is 643027177136.

It is a self number, because there is not a number n which added to its sum of digits gives 631771720346.

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, 13736336 + ... + 13782251.

It is an arithmetic number, because the mean of its divisors is an integer number (63856883454).

Almost surely, 2^631771720346 is an apocalyptic number.

631771720346 is a deficient number, since it is larger than the sum of its proper divisors (389938414918).

631771720346 is a wasteful number, since it uses less digits than its factorization.

631771720346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27519485.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 631771720346 in words is "six hundred thirty-one billion, seven hundred seventy-one million, seven hundred twenty thousand, three hundred forty-six".