38678652557 has 2 divisors, whose sum is σ = 38678652558. Its totient is φ = 38678652556.

The previous prime is 38678652527. The next prime is 38678652631. The reversal of 38678652557 is 75525687683.

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., 35499835396 + 3178817161 = 188414^2 + 56381^2 .

It is an emirp because it is prime and its reverse (75525687683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38678652557 - 2⁸ = 38678652301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38678652557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38678652527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19339326278 + 19339326279.

It is an arithmetic number, because the mean of its divisors is an integer number (19339326279).

Almost surely, 2^38678652557 is an apocalyptic number.

It is an amenable number.

38678652557 is a deficient number, since it is larger than the sum of its proper divisors (1).

38678652557 is an equidigital number, since it uses as much as digits as its factorization.

38678652557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672000, while the sum is 62.

The spelling of 38678652557 in words is "thirty-eight billion, six hundred seventy-eight million, six hundred fifty-two thousand, five hundred fifty-seven".