320687615605607 has 2 divisors, whose sum is σ = 320687615605608. Its totient is φ = 320687615605606.

The previous prime is 320687615605583. The next prime is 320687615605681. The reversal of 320687615605607 is 706506516786023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320687615605607 - 2¹² = 320687615601511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320687615605607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320687615605507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160343807802803 + 160343807802804.

It is an arithmetic number, because the mean of its divisors is an integer number (160343807802804).

Almost surely, 2^{320687615605607} is an apocalyptic number.

320687615605607 is a deficient number, since it is larger than the sum of its proper divisors (1).

320687615605607 is an equidigital number, since it uses as much as digits as its factorization.

320687615605607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76204800, while the sum is 62.

The spelling of 320687615605607 in words is "three hundred twenty trillion, six hundred eighty-seven billion, six hundred fifteen million, six hundred five thousand, six hundred seven".