31449640866 has 64 divisors (see below), whose sum is σ = 72482101248. Its totient is φ = 8911202688.

The previous prime is 31449640823. The next prime is 31449640879. The reversal of 31449640866 is 66804694413.

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 31 ways as a sum of consecutive naturals, for example, 3329286 + ... + 3338718.

It is an arithmetic number, because the mean of its divisors is an integer number (1132532832).

Almost surely, 2^31449640866 is an apocalyptic number.

31449640866 is an abundant number, since it is smaller than the sum of its proper divisors (41032460382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31449640866 is a wasteful number, since it uses less digits than its factorization.

31449640866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10095.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 31449640866 in words is "thirty-one billion, four hundred forty-nine million, six hundred forty thousand, eight hundred sixty-six".