381020853813 has 24 divisors (see below), whose sum is σ = 515792423328. Its totient is φ = 250181473056.

The previous prime is 381020853809. The next prime is 381020853841. The reversal of 381020853813 is 318358020183.

It is not a de Polignac number, because 381020853813 - 2² = 381020853809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381020853853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5909970 + ... + 5974092.

It is an arithmetic number, because the mean of its divisors is an integer number (21491350972).

Almost surely, 2^381020853813 is an apocalyptic number.

It is an amenable number.

381020853813 is a deficient number, since it is larger than the sum of its proper divisors (134771569515).

381020853813 is a wasteful number, since it uses less digits than its factorization.

381020853813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64513 (or 64406 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

Adding to 381020853813 its reverse (318358020183), we get a palindrome (699378873996).

The spelling of 381020853813 in words is "three hundred eighty-one billion, twenty million, eight hundred fifty-three thousand, eight hundred thirteen".