38552186681 has 2 divisors, whose sum is σ = 38552186682. Its totient is φ = 38552186680.

The previous prime is 38552186671. The next prime is 38552186749. The reversal of 38552186681 is 18668125583.

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., 36572737600 + 1979449081 = 191240^2 + 44491^2 .

It is a cyclic number.

It is not a de Polignac number, because 38552186681 - 2¹⁴ = 38552170297 is a prime.

It is a super-2 number, since 2×38552186681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38552186671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19276093340 + 19276093341.

It is an arithmetic number, because the mean of its divisors is an integer number (19276093341).

Almost surely, 2^38552186681 is an apocalyptic number.

It is an amenable number.

38552186681 is a deficient number, since it is larger than the sum of its proper divisors (1).

38552186681 is an equidigital number, since it uses as much as digits as its factorization.

38552186681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2764800, while the sum is 53.

The spelling of 38552186681 in words is "thirty-eight billion, five hundred fifty-two million, one hundred eighty-six thousand, six hundred eighty-one".