31956660611 has 2 divisors, whose sum is σ = 31956660612. Its totient is φ = 31956660610.

The previous prime is 31956660551. The next prime is 31956660629. The reversal of 31956660611 is 11606665913.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11606665913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31956660611 is a prime.

It is not a weakly prime, because it can be changed into another prime (31956660011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15978330305 + 15978330306.

It is an arithmetic number, because the mean of its divisors is an integer number (15978330306).

Almost surely, 2^31956660611 is an apocalyptic number.

31956660611 is a deficient number, since it is larger than the sum of its proper divisors (1).

31956660611 is an equidigital number, since it uses as much as digits as its factorization.

31956660611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 44.

The spelling of 31956660611 in words is "thirty-one billion, nine hundred fifty-six million, six hundred sixty thousand, six hundred eleven".