38785388197 has 4 divisors (see below), whose sum is σ = 39364274656. Its totient is φ = 38206501740.

The previous prime is 38785388189. The next prime is 38785388203. The reversal of 38785388197 is 79188358783.

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 38785388197 - 2³ = 38785388189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (67), and also a Moran number because the ratio is a prime number: 578886391 = 38785388197 / (3 + 8 + 7 + 8 + 5 + 3 + 8 + 8 + 1 + 9 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38785388107) 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, 289443129 + ... + 289443262.

It is an arithmetic number, because the mean of its divisors is an integer number (9841068664).

Almost surely, 2^38785388197 is an apocalyptic number.

It is an amenable number.

38785388197 is a deficient number, since it is larger than the sum of its proper divisors (578886459).

38785388197 is an equidigital number, since it uses as much as digits as its factorization.

38785388197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578886458.

The product of its digits is 81285120, while the sum is 67.

The spelling of 38785388197 in words is "thirty-eight billion, seven hundred eighty-five million, three hundred eighty-eight thousand, one hundred ninety-seven".