38524842581 has 2 divisors, whose sum is σ = 38524842582. Its totient is φ = 38524842580.

The previous prime is 38524842571. The next prime is 38524842589. The reversal of 38524842581 is 18524842583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21444966481 + 17079876100 = 146441^2 + 130690^2 .

It is a cyclic number.

It is not a de Polignac number, because 38524842581 - 2¹⁰ = 38524841557 is a prime.

It is a super-2 number, since 2×38524842581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38524842589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19262421290 + 19262421291.

It is an arithmetic number, because the mean of its divisors is an integer number (19262421291).

Almost surely, 2^38524842581 is an apocalyptic number.

It is an amenable number.

38524842581 is a deficient number, since it is larger than the sum of its proper divisors (1).

38524842581 is an equidigital number, since it uses as much as digits as its factorization.

38524842581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2457600, while the sum is 50.

The spelling of 38524842581 in words is "thirty-eight billion, five hundred twenty-four million, eight hundred forty-two thousand, five hundred eighty-one".