38166217723831 has 2 divisors, whose sum is σ = 38166217723832. Its totient is φ = 38166217723830.

The previous prime is 38166217723819. The next prime is 38166217723903. The reversal of 38166217723831 is 13832771266183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38166217723831 - 2⁴¹ = 35967194468279 is a prime.

It is a super-2 number, since 2×38166217723831² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38166217723631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19083108861915 + 19083108861916.

It is an arithmetic number, because the mean of its divisors is an integer number (19083108861916).

Almost surely, 2^{38166217723831} is an apocalyptic number.

38166217723831 is a deficient number, since it is larger than the sum of its proper divisors (1).

38166217723831 is an equidigital number, since it uses as much as digits as its factorization.

38166217723831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 58.

The spelling of 38166217723831 in words is "thirty-eight trillion, one hundred sixty-six billion, two hundred seventeen million, seven hundred twenty-three thousand, eight hundred thirty-one".