31661662906 has 16 divisors (see below), whose sum is σ = 48635136000. Its totient is φ = 15450529248.

The previous prime is 31661662867. The next prime is 31661662933. The reversal of 31661662906 is 60926616613.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33931 + ... + 253918.

It is an arithmetic number, because the mean of its divisors is an integer number (3039696000).

Almost surely, 2^31661662906 is an apocalyptic number.

31661662906 is a deficient number, since it is larger than the sum of its proper divisors (16973473094).

31661662906 is a wasteful number, since it uses less digits than its factorization.

31661662906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289173.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 31661662906 in words is "thirty-one billion, six hundred sixty-one million, six hundred sixty-two thousand, nine hundred six".