631581022678 has 8 divisors (see below), whose sum is σ = 951437506968. Its totient is φ = 314435187024.

The previous prime is 631581022669. The next prime is 631581022733. The reversal of 631581022678 is 876220185136.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 677661576 + ... + 677662507.

It is an arithmetic number, because the mean of its divisors is an integer number (118929688371).

Almost surely, 2^631581022678 is an apocalyptic number.

631581022678 is a deficient number, since it is larger than the sum of its proper divisors (319856484290).

631581022678 is a wasteful number, since it uses less digits than its factorization.

631581022678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355324318.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 631581022678 in words is "six hundred thirty-one billion, five hundred eighty-one million, twenty-two thousand, six hundred seventy-eight".