38171138749 has 2 divisors, whose sum is σ = 38171138750. Its totient is φ = 38171138748.

The previous prime is 38171138729. The next prime is 38171138771. The reversal of 38171138749 is 94783117183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32505565849 + 5665572900 = 180293^2 + 75270^2 .

It is a cyclic number.

It is not a de Polignac number, because 38171138749 - 2⁹ = 38171138237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38171138696 and 38171138705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38171138729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19085569374 + 19085569375.

It is an arithmetic number, because the mean of its divisors is an integer number (19085569375).

Almost surely, 2^38171138749 is an apocalyptic number.

It is an amenable number.

38171138749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38171138749 is an equidigital number, since it uses as much as digits as its factorization.

38171138749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 52.

The spelling of 38171138749 in words is "thirty-eight billion, one hundred seventy-one million, one hundred thirty-eight thousand, seven hundred forty-nine".