38400120634181 has 2 divisors, whose sum is σ = 38400120634182. Its totient is φ = 38400120634180.

The previous prime is 38400120634151. The next prime is 38400120634259. The reversal of 38400120634181 is 18143602100483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31889794881025 + 6510325753156 = 5647105^2 + 2551534^2 .

It is a cyclic number.

It is not a de Polignac number, because 38400120634181 - 2¹⁰ = 38400120633157 is a prime.

It is a super-2 number, since 2×38400120634181² (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 (38400120634151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19200060317090 + 19200060317091.

It is an arithmetic number, because the mean of its divisors is an integer number (19200060317091).

Almost surely, 2^{38400120634181} is an apocalyptic number.

It is an amenable number.

38400120634181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38400120634181 is an equidigital number, since it uses as much as digits as its factorization.

38400120634181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 38400120634181 in words is "thirty-eight trillion, four hundred billion, one hundred twenty million, six hundred thirty-four thousand, one hundred eighty-one".