38149816321 has 2 divisors, whose sum is σ = 38149816322. Its totient is φ = 38149816320.

The previous prime is 38149816307. The next prime is 38149816357. The reversal of 38149816321 is 12361894183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26916996096 + 11232820225 = 164064^2 + 105985^2 .

It is a cyclic number.

It is not a de Polignac number, because 38149816321 - 2²³ = 38141427713 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (38149816301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19074908160 + 19074908161.

It is an arithmetic number, because the mean of its divisors is an integer number (19074908161).

It is a Proth number, since it is equal to 72765 ⋅ 2¹⁹ + 1 and 72765 < 2¹⁹.

Almost surely, 2^38149816321 is an apocalyptic number.

It is an amenable number.

38149816321 is a deficient number, since it is larger than the sum of its proper divisors (1).

38149816321 is an equidigital number, since it uses as much as digits as its factorization.

38149816321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The spelling of 38149816321 in words is "thirty-eight billion, one hundred forty-nine million, eight hundred sixteen thousand, three hundred twenty-one".