38253450581 has 4 divisors (see below), whose sum is σ = 38280258912. Its totient is φ = 38226642252.

The previous prime is 38253450577. The next prime is 38253450589. The reversal of 38253450581 is 18505435283.

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 38253450581 - 2² = 38253450577 is a prime.

It is a super-2 number, since 2×38253450581² (a number of 22 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 (38253450589) 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, 13402025 + ... + 13404878.

It is an arithmetic number, because the mean of its divisors is an integer number (9570064728).

Almost surely, 2^38253450581 is an apocalyptic number.

It is an amenable number.

38253450581 is a deficient number, since it is larger than the sum of its proper divisors (26808331).

38253450581 is a wasteful number, since it uses less digits than its factorization.

38253450581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26808330.

The product of its (nonzero) digits is 576000, while the sum is 44.

The spelling of 38253450581 in words is "thirty-eight billion, two hundred fifty-three million, four hundred fifty thousand, five hundred eighty-one".