38436137749 has 2 divisors, whose sum is σ = 38436137750. Its totient is φ = 38436137748.

The previous prime is 38436137717. The next prime is 38436137851. The reversal of 38436137749 is 94773163483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25904902500 + 12531235249 = 160950^2 + 111943^2 .

It is a cyclic number.

It is not a de Polignac number, because 38436137749 - 2⁵ = 38436137717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38436137749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38436737749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19218068874 + 19218068875.

It is an arithmetic number, because the mean of its divisors is an integer number (19218068875).

Almost surely, 2^38436137749 is an apocalyptic number.

It is an amenable number.

38436137749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38436137749 is an equidigital number, since it uses as much as digits as its factorization.

38436137749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 55.

The spelling of 38436137749 in words is "thirty-eight billion, four hundred thirty-six million, one hundred thirty-seven thousand, seven hundred forty-nine".