78291618796 has 6 divisors (see below), whose sum is σ = 137010332900. Its totient is φ = 39145809396.

The previous prime is 78291618749. The next prime is 78291618841. The reversal of 78291618796 is 69781619287.

It is a super-2 number, since 2×78291618796² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9786452346 + ... + 9786452353.

Almost surely, 2^78291618796 is an apocalyptic number.

It is an amenable number.

78291618796 is a deficient number, since it is larger than the sum of its proper divisors (58718714104).

78291618796 is a wasteful number, since it uses less digits than its factorization.

78291618796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19572904703 (or 19572904701 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 64.

The spelling of 78291618796 in words is "seventy-eight billion, two hundred ninety-one million, six hundred eighteen thousand, seven hundred ninety-six".