631684807007 has 4 divisors (see below), whose sum is σ = 646375151400. Its totient is φ = 616994462616.

The previous prime is 631684806983. The next prime is 631684807037. The reversal of 631684807007 is 700708486136.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631684807007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631684807037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7345172132 + ... + 7345172217.

It is an arithmetic number, because the mean of its divisors is an integer number (161593787850).

Almost surely, 2^631684807007 is an apocalyptic number.

631684807007 is a deficient number, since it is larger than the sum of its proper divisors (14690344393).

631684807007 is a wasteful number, since it uses less digits than its factorization.

631684807007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14690344392.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 631684807007 in words is "six hundred thirty-one billion, six hundred eighty-four million, eight hundred seven thousand, seven".