38513484749 has 2 divisors, whose sum is σ = 38513484750. Its totient is φ = 38513484748.

The previous prime is 38513484739. The next prime is 38513484761. The reversal of 38513484749 is 94748431583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35426015524 + 3087469225 = 188218^2 + 55565^2 .

It is a cyclic number.

It is not a de Polignac number, because 38513484749 - 2⁴ = 38513484733 is a prime.

It is a super-2 number, since 2×38513484749² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 38513484694 and 38513484703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38513484739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19256742374 + 19256742375.

It is an arithmetic number, because the mean of its divisors is an integer number (19256742375).

Almost surely, 2^38513484749 is an apocalyptic number.

It is an amenable number.

38513484749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38513484749 is an equidigital number, since it uses as much as digits as its factorization.

38513484749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 56.

The spelling of 38513484749 in words is "thirty-eight billion, five hundred thirteen million, four hundred eighty-four thousand, seven hundred forty-nine".