78305358381 has 8 divisors (see below), whose sum is σ = 104409464544. Its totient is φ = 52202412240.

The previous prime is 78305358283. The next prime is 78305358403. The reversal of 78305358381 is 18385350387.

It is a happy number.

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

It is not a de Polignac number, because 78305358381 - 2¹¹ = 78305356333 is a prime.

It is a super-2 number, since 2×78305358381² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78305358281) 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, 117906 + ... + 412931.

It is an arithmetic number, because the mean of its divisors is an integer number (13051183068).

Almost surely, 2^78305358381 is an apocalyptic number.

It is an amenable number.

78305358381 is a deficient number, since it is larger than the sum of its proper divisors (26104106163).

78305358381 is a wasteful number, since it uses less digits than its factorization.

78305358381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580011.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 78305358381 in words is "seventy-eight billion, three hundred five million, three hundred fifty-eight thousand, three hundred eighty-one".