78384771364 has 12 divisors (see below), whose sum is σ = 137306148364. Its totient is φ = 39154443264.

The previous prime is 78384771347. The next prime is 78384771407. The reversal of 78384771364 is 46317748387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 65295580900 + 13089190464 = 255530^2 + 114408^2 .

It is a super-2 number, since 2×78384771364² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78384771299 and 78384771308.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9480957 + ... + 9489220.

Almost surely, 2^78384771364 is an apocalyptic number.

It is an amenable number.

78384771364 is a deficient number, since it is larger than the sum of its proper divisors (58921377000).

78384771364 is a wasteful number, since it uses less digits than its factorization.

78384771364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18971214 (or 18971212 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 58.

The spelling of 78384771364 in words is "seventy-eight billion, three hundred eighty-four million, seven hundred seventy-one thousand, three hundred sixty-four".