31355066644 has 12 divisors (see below), whose sum is σ = 59859672768. Its totient is φ = 14252303000.

The previous prime is 31355066629. The next prime is 31355066689. The reversal of 31355066644 is 44666055313.

It is a self number, because there is not a number n which added to its sum of digits gives 31355066644.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356307532 + ... + 356307619.

It is an arithmetic number, because the mean of its divisors is an integer number (4988306064).

Almost surely, 2^31355066644 is an apocalyptic number.

It is an amenable number.

31355066644 is a deficient number, since it is larger than the sum of its proper divisors (28504606124).

31355066644 is a wasteful number, since it uses less digits than its factorization.

31355066644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712615166 (or 712615164 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 31355066644 in words is "thirty-one billion, three hundred fifty-five million, sixty-six thousand, six hundred forty-four".