38208057557 has 2 divisors, whose sum is σ = 38208057558. Its totient is φ = 38208057556.

The previous prime is 38208057533. The next prime is 38208057571. The reversal of 38208057557 is 75575080283.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38206957156 + 1100401 = 195466^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 38208057557 - 2⁸ = 38208057301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38208057257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19104028778 + 19104028779.

It is an arithmetic number, because the mean of its divisors is an integer number (19104028779).

Almost surely, 2^38208057557 is an apocalyptic number.

It is an amenable number.

38208057557 is a deficient number, since it is larger than the sum of its proper divisors (1).

38208057557 is an equidigital number, since it uses as much as digits as its factorization.

38208057557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352000, while the sum is 50.

The spelling of 38208057557 in words is "thirty-eight billion, two hundred eight million, fifty-seven thousand, five hundred fifty-seven".