38317552561 has 2 divisors, whose sum is σ = 38317552562. Its totient is φ = 38317552560.

The previous prime is 38317552549. The next prime is 38317552607. The reversal of 38317552561 is 16525571383.

It is an a-pointer prime, because the next prime (38317552607) can be obtained adding 38317552561 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21500650161 + 16816902400 = 146631^2 + 129680^2 .

It is a cyclic number.

It is not a de Polignac number, because 38317552561 - 2³⁵ = 3957814193 is a prime.

It is not a weakly prime, because it can be changed into another prime (38317552061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19158776280 + 19158776281.

It is an arithmetic number, because the mean of its divisors is an integer number (19158776281).

Almost surely, 2^38317552561 is an apocalyptic number.

It is an amenable number.

38317552561 is a deficient number, since it is larger than the sum of its proper divisors (1).

38317552561 is an equidigital number, since it uses as much as digits as its factorization.

38317552561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 46.

The spelling of 38317552561 in words is "thirty-eight billion, three hundred seventeen million, five hundred fifty-two thousand, five hundred sixty-one".