78368369939 has 8 divisors (see below), whose sum is σ = 79150302000. Its totient is φ = 77587582752.

The previous prime is 78368369899. The next prime is 78368369977. The reversal of 78368369939 is 93996386387.

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 78368369939 - 2¹² = 78368365843 is a prime.

It is a super-2 number, since 2×78368369939² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78368369239) 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, 148304 + ... + 422765.

It is an arithmetic number, because the mean of its divisors is an integer number (9893787750).

Almost surely, 2^78368369939 is an apocalyptic number.

78368369939 is a deficient number, since it is larger than the sum of its proper divisors (781932061).

78368369939 is a wasteful number, since it uses less digits than its factorization.

78368369939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572437.

The product of its digits is 317447424, while the sum is 71.

The spelling of 78368369939 in words is "seventy-eight billion, three hundred sixty-eight million, three hundred sixty-nine thousand, nine hundred thirty-nine".