38549471657 has 2 divisors, whose sum is σ = 38549471658. Its totient is φ = 38549471656.

The previous prime is 38549471629. The next prime is 38549471687. The reversal of 38549471657 is 75617494583.

38549471657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22423265536 + 16126206121 = 149744^2 + 126989^2 .

It is a cyclic number.

It is not a de Polignac number, because 38549471657 - 2¹⁶ = 38549406121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38549471596 and 38549471605.

It is not a weakly prime, because it can be changed into another prime (38549471617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19274735828 + 19274735829.

It is an arithmetic number, because the mean of its divisors is an integer number (19274735829).

Almost surely, 2^38549471657 is an apocalyptic number.

It is an amenable number.

38549471657 is a deficient number, since it is larger than the sum of its proper divisors (1).

38549471657 is an equidigital number, since it uses as much as digits as its factorization.

38549471657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25401600, while the sum is 59.

The spelling of 38549471657 in words is "thirty-eight billion, five hundred forty-nine million, four hundred seventy-one thousand, six hundred fifty-seven".