78394603682 has 8 divisors (see below), whose sum is σ = 117595014636. Its totient is φ = 39196265472.

The previous prime is 78394603681. The next prime is 78394603691. The reversal of 78394603682 is 28630649387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67014194641 + 11380409041 = 258871^2 + 106679^2 .

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

It is a super-2 number, since 2×78394603682² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78394603681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419903 + ... + 577154.

Almost surely, 2^78394603682 is an apocalyptic number.

78394603682 is a deficient number, since it is larger than the sum of its proper divisors (39200410954).

78394603682 is a wasteful number, since it uses less digits than its factorization.

78394603682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036372.

The product of its (nonzero) digits is 10450944, while the sum is 56.

The spelling of 78394603682 in words is "seventy-eight billion, three hundred ninety-four million, six hundred three thousand, six hundred eighty-two".