38746285572581 has 4 divisors (see below), whose sum is σ = 38820370249152. Its totient is φ = 38672200896012.

The previous prime is 38746285572571. The next prime is 38746285572667. The reversal of 38746285572581 is 18527558264783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38746285572581 - 2⁶ = 38746285572517 is a prime.

It is a super-2 number, since 2×38746285572581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38746285572571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37042337501 + ... + 37042338546.

It is an arithmetic number, because the mean of its divisors is an integer number (9705092562288).

Almost surely, 2^{38746285572581} is an apocalyptic number.

It is an amenable number.

38746285572581 is a deficient number, since it is larger than the sum of its proper divisors (74084676571).

38746285572581 is an equidigital number, since it uses as much as digits as its factorization.

38746285572581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74084676570.

The product of its digits is 903168000, while the sum is 71.

The spelling of 38746285572581 in words is "thirty-eight trillion, seven hundred forty-six billion, two hundred eighty-five million, five hundred seventy-two thousand, five hundred eighty-one".