38587115509 has 2 divisors, whose sum is σ = 38587115510. Its totient is φ = 38587115508.

The previous prime is 38587115417. The next prime is 38587115521. The reversal of 38587115509 is 90551178583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37632120100 + 954995409 = 193990^2 + 30903^2 .

It is a cyclic number.

It is not a de Polignac number, because 38587115509 - 2⁷ = 38587115381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38587119509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19293557754 + 19293557755.

It is an arithmetic number, because the mean of its divisors is an integer number (19293557755).

Almost surely, 2^38587115509 is an apocalyptic number.

It is an amenable number.

38587115509 is a deficient number, since it is larger than the sum of its proper divisors (1).

38587115509 is an equidigital number, since it uses as much as digits as its factorization.

38587115509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512000, while the sum is 52.

The spelling of 38587115509 in words is "thirty-eight billion, five hundred eighty-seven million, one hundred fifteen thousand, five hundred nine".