38775370521 has 4 divisors (see below), whose sum is σ = 51700494032. Its totient is φ = 25850247012.

The previous prime is 38775370511. The next prime is 38775370523. The reversal of 38775370521 is 12507357783.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12507357783 = 3 ⋅4169119261.

It is not a de Polignac number, because 38775370521 - 2⁶ = 38775370457 is a prime.

It is a super-2 number, since 2×38775370521² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38775370523) 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, 6462561751 + ... + 6462561756.

It is an arithmetic number, because the mean of its divisors is an integer number (12925123508).

Almost surely, 2^38775370521 is an apocalyptic number.

It is an amenable number.

38775370521 is a deficient number, since it is larger than the sum of its proper divisors (12925123511).

38775370521 is a wasteful number, since it uses less digits than its factorization.

38775370521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925123510.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 38775370521 in words is "thirty-eight billion, seven hundred seventy-five million, three hundred seventy thousand, five hundred twenty-one".