631777431745 has 8 divisors (see below), whose sum is σ = 758630716416. Its totient is φ = 505090079856.

The previous prime is 631777431731. The next prime is 631777431757. The reversal of 631777431745 is 547134777136.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631777431745 - 2⁵ = 631777431713 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 41474817 + ... + 41490046.

It is an arithmetic number, because the mean of its divisors is an integer number (94828839552).

Almost surely, 2^631777431745 is an apocalyptic number.

It is an amenable number.

631777431745 is a deficient number, since it is larger than the sum of its proper divisors (126853284671).

631777431745 is a wasteful number, since it uses less digits than its factorization.

631777431745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82966391.

The product of its digits is 10372320, while the sum is 55.

The spelling of 631777431745 in words is "six hundred thirty-one billion, seven hundred seventy-seven million, four hundred thirty-one thousand, seven hundred forty-five".