919739378678839 has 8 divisors (see below), whose sum is σ = 946254048974960. Its totient is φ = 893600802997056.

The previous prime is 919739378678837. The next prime is 919739378678849. The reversal of 919739378678839 is 938876873937919.

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

It is a cyclic number.

It is not a de Polignac number, because 919739378678839 - 2¹ = 919739378678837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919739378678837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94023648624 + ... + 94023658405.

It is an arithmetic number, because the mean of its divisors is an integer number (118281756121870).

Almost surely, 2^{919739378678839} is an apocalyptic number.

919739378678839 is a deficient number, since it is larger than the sum of its proper divisors (26514670296121).

919739378678839 is a wasteful number, since it uses less digits than its factorization.

919739378678839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188047307169.

The product of its digits is 186659085312, while the sum is 97.

The spelling of 919739378678839 in words is "nine hundred nineteen trillion, seven hundred thirty-nine billion, three hundred seventy-eight million, six hundred seventy-eight thousand, eight hundred thirty-nine".