38605508821 has 4 divisors (see below), whose sum is σ = 42115100544. Its totient is φ = 35095917100.

The previous prime is 38605508813. The next prime is 38605508839. The reversal of 38605508821 is 12880550683.

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 38605508821 - 2³ = 38605508813 is a prime.

It is a super-2 number, since 2×38605508821² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38605508621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1754795845 + ... + 1754795866.

It is an arithmetic number, because the mean of its divisors is an integer number (10528775136).

Almost surely, 2^38605508821 is an apocalyptic number.

It is an amenable number.

38605508821 is a deficient number, since it is larger than the sum of its proper divisors (3509591723).

38605508821 is a wasteful number, since it uses less digits than its factorization.

38605508821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3509591722.

The product of its (nonzero) digits is 460800, while the sum is 46.

The spelling of 38605508821 in words is "thirty-eight billion, six hundred five million, five hundred eight thousand, eight hundred twenty-one".