631861799379 has 16 divisors (see below), whose sum is σ = 858698330112. Its totient is φ = 413139160928.

The previous prime is 631861799377. The next prime is 631861799383. The reversal of 631861799379 is 973997168136.

It is a cyclic number.

It is not a de Polignac number, because 631861799379 - 2¹ = 631861799377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631861799377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312249 + ... + 1166714.

It is an arithmetic number, because the mean of its divisors is an integer number (53668645632).

Almost surely, 2^631861799379 is an apocalyptic number.

631861799379 is a deficient number, since it is larger than the sum of its proper divisors (226836530733).

631861799379 is a wasteful number, since it uses less digits than its factorization.

631861799379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481706.

The product of its digits is 92588832, while the sum is 69.

The spelling of 631861799379 in words is "six hundred thirty-one billion, eight hundred sixty-one million, seven hundred ninety-nine thousand, three hundred seventy-nine".