78956404434 has 12 divisors (see below), whose sum is σ = 171072209646. Its totient is φ = 26318801472.

The previous prime is 78956404369. The next prime is 78956404441. The reversal of 78956404434 is 43440465987.

78956404434 is a `hidden beast` number, since 7 + 8 + 9 + 564 + 0 + 44 + 34 = 666.

It can be written as a sum of positive squares in only one way, i.e., 73060468209 + 5895936225 = 270297^2 + 76785^2 .

It is a super-2 number, since 2×78956404434² (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 (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2193233439 + ... + 2193233474.

Almost surely, 2^78956404434 is an apocalyptic number.

78956404434 is an abundant number, since it is smaller than the sum of its proper divisors (92115805212).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78956404434 is a wasteful number, since it uses less digits than its factorization.

78956404434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4386466921 (or 4386466918 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 78956404434 in words is "seventy-eight billion, nine hundred fifty-six million, four hundred four thousand, four hundred thirty-four".