31728746011 has 2 divisors, whose sum is σ = 31728746012. Its totient is φ = 31728746010.

The previous prime is 31728746003. The next prime is 31728746033. The reversal of 31728746011 is 11064782713.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31728746011 - 2³ = 31728746003 is a prime.

It is not a weakly prime, because it can be changed into another prime (31728746051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15864373005 + 15864373006.

It is an arithmetic number, because the mean of its divisors is an integer number (15864373006).

Almost surely, 2^31728746011 is an apocalyptic number.

31728746011 is a deficient number, since it is larger than the sum of its proper divisors (1).

31728746011 is an equidigital number, since it uses as much as digits as its factorization.

31728746011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 31728746011 in words is "thirty-one billion, seven hundred twenty-eight million, seven hundred forty-six thousand, eleven".