38166827261 has 2 divisors, whose sum is σ = 38166827262. Its totient is φ = 38166827260.

The previous prime is 38166827221. The next prime is 38166827267. The reversal of 38166827261 is 16272866183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38129982361 + 36844900 = 195269^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 38166827261 - 2¹⁸ = 38166565117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38166827267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19083413630 + 19083413631.

It is an arithmetic number, because the mean of its divisors is an integer number (19083413631).

Almost surely, 2^38166827261 is an apocalyptic number.

It is an amenable number.

38166827261 is a deficient number, since it is larger than the sum of its proper divisors (1).

38166827261 is an equidigital number, since it uses as much as digits as its factorization.

38166827261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 50.

The spelling of 38166827261 in words is "thirty-eight billion, one hundred sixty-six million, eight hundred twenty-seven thousand, two hundred sixty-one".