38636605851 has 4 divisors (see below), whose sum is σ = 51515474472. Its totient is φ = 25757737232.

The previous prime is 38636605817. The next prime is 38636605859. The reversal of 38636605851 is 15850663683.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38636605851 - 2⁷ = 38636605723 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38636605794 and 38636605803.

It is not an unprimeable number, because it can be changed into a prime (38636605859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6439434306 + ... + 6439434311.

It is an arithmetic number, because the mean of its divisors is an integer number (12878868618).

Almost surely, 2^38636605851 is an apocalyptic number.

38636605851 is a deficient number, since it is larger than the sum of its proper divisors (12878868621).

38636605851 is a wasteful number, since it uses less digits than its factorization.

38636605851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12878868620.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The spelling of 38636605851 in words is "thirty-eight billion, six hundred thirty-six million, six hundred five thousand, eight hundred fifty-one".