38627971561 has 2 divisors, whose sum is σ = 38627971562. Its totient is φ = 38627971560.

The previous prime is 38627971559. The next prime is 38627971607. The reversal of 38627971561 is 16517972683.

38627971561 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., 33775455961 + 4852515600 = 183781^2 + 69660^2 .

It is a cyclic number.

It is not a de Polignac number, because 38627971561 - 2¹ = 38627971559 is a prime.

Together with 38627971559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38627971541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19313985780 + 19313985781.

It is an arithmetic number, because the mean of its divisors is an integer number (19313985781).

Almost surely, 2^38627971561 is an apocalyptic number.

It is an amenable number.

38627971561 is a deficient number, since it is larger than the sum of its proper divisors (1).

38627971561 is an equidigital number, since it uses as much as digits as its factorization.

38627971561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The spelling of 38627971561 in words is "thirty-eight billion, six hundred twenty-seven million, nine hundred seventy-one thousand, five hundred sixty-one".