38415949813 has 2 divisors, whose sum is σ = 38415949814. Its totient is φ = 38415949812.

The previous prime is 38415949799. The next prime is 38415949849. The reversal of 38415949813 is 31894951483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35080540804 + 3335409009 = 187298^2 + 57753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38415949813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38415949853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19207974906 + 19207974907.

It is an arithmetic number, because the mean of its divisors is an integer number (19207974907).

Almost surely, 2^38415949813 is an apocalyptic number.

It is an amenable number.

38415949813 is a deficient number, since it is larger than the sum of its proper divisors (1).

38415949813 is an equidigital number, since it uses as much as digits as its factorization.

38415949813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 55.

The spelling of 38415949813 in words is "thirty-eight billion, four hundred fifteen million, nine hundred forty-nine thousand, eight hundred thirteen".