838072780813 has 8 divisors (see below), whose sum is σ = 882191805920. Its totient is φ = 793954748880.

The previous prime is 838072780799. The next prime is 838072780859. The reversal of 838072780813 is 318087270838.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838072780813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838072780873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2011006 + ... + 2391712.

It is an arithmetic number, because the mean of its divisors is an integer number (110273975740).

Almost surely, 2^838072780813 is an apocalyptic number.

It is an amenable number.

838072780813 is a deficient number, since it is larger than the sum of its proper divisors (44119025107).

838072780813 is a wasteful number, since it uses less digits than its factorization.

838072780813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496587.

The product of its (nonzero) digits is 3612672, while the sum is 55.

The spelling of 838072780813 in words is "eight hundred thirty-eight billion, seventy-two million, seven hundred eighty thousand, eight hundred thirteen".