38720801556559 has 2 divisors, whose sum is σ = 38720801556560. Its totient is φ = 38720801556558.

The previous prime is 38720801556557. The next prime is 38720801556601. The reversal of 38720801556559 is 95565510802783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38720801556559 - 2¹ = 38720801556557 is a prime.

Together with 38720801556557, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 38720801556559.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38720801556557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19360400778279 + 19360400778280.

It is an arithmetic number, because the mean of its divisors is an integer number (19360400778280).

Almost surely, 2^{38720801556559} is an apocalyptic number.

38720801556559 is a deficient number, since it is larger than the sum of its proper divisors (1).

38720801556559 is an equidigital number, since it uses as much as digits as its factorization.

38720801556559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720000, while the sum is 64.

The spelling of 38720801556559 in words is "thirty-eight trillion, seven hundred twenty billion, eight hundred one million, five hundred fifty-six thousand, five hundred fifty-nine".