31356345066 has 32 divisors (see below), whose sum is σ = 64065247488. Its totient is φ = 10226815680.

The previous prime is 31356345043. The next prime is 31356345077. The reversal of 31356345066 is 66054365313.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1120096 + ... + 1147748.

It is an arithmetic number, because the mean of its divisors is an integer number (2002038984).

Almost surely, 2^31356345066 is an apocalyptic number.

31356345066 is an abundant number, since it is smaller than the sum of its proper divisors (32708902422).

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

31356345066 is a wasteful number, since it uses less digits than its factorization.

31356345066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31726.

The product of its (nonzero) digits is 583200, while the sum is 42.

The spelling of 31356345066 in words is "thirty-one billion, three hundred fifty-six million, three hundred forty-five thousand, sixty-six".