31444738666 has 32 divisors (see below), whose sum is σ = 51691576320. Its totient is φ = 14227455600.

The previous prime is 31444738643. The next prime is 31444738691. The reversal of 31444738666 is 66683744413.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10414105 + ... + 10417123.

It is an arithmetic number, because the mean of its divisors is an integer number (1615361760).

Almost surely, 2^31444738666 is an apocalyptic number.

31444738666 is a deficient number, since it is larger than the sum of its proper divisors (20246837654).

31444738666 is a wasteful number, since it uses less digits than its factorization.

31444738666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5050.

The product of its digits is 6967296, while the sum is 52.

The spelling of 31444738666 in words is "thirty-one billion, four hundred forty-four million, seven hundred thirty-eight thousand, six hundred sixty-six".