31664346136 has 8 divisors (see below), whose sum is σ = 59370649020. Its totient is φ = 15832173064.

The previous prime is 31664346107. The next prime is 31664346157. The reversal of 31664346136 is 63164346613.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31664346092 and 31664346101.

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 as a sum of consecutive naturals, namely, 1979021626 + ... + 1979021641.

Almost surely, 2^31664346136 is an apocalyptic number.

It is an amenable number.

31664346136 is a deficient number, since it is larger than the sum of its proper divisors (27706302884).

31664346136 is a wasteful number, since it uses less digits than its factorization.

31664346136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958043273 (or 3958043269 counting only the distinct ones).

The product of its digits is 559872, while the sum is 43.

The spelling of 31664346136 in words is "thirty-one billion, six hundred sixty-four million, three hundred forty-six thousand, one hundred thirty-six".