78776846416 has 10 divisors (see below), whose sum is σ = 152630139962. Its totient is φ = 39388423200.

The previous prime is 78776846387. The next prime is 78776846437. The reversal of 78776846416 is 61464867787.

It can be written as a sum of positive squares in only one way, i.e., 71291136016 + 7485710400 = 267004^2 + 86520^2 .

It is a super-3 number, since 3×78776846416³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 2461776435 + ... + 2461776466.

Almost surely, 2^78776846416 is an apocalyptic number.

It is an amenable number.

78776846416 is a deficient number, since it is larger than the sum of its proper divisors (73853293546).

78776846416 is a wasteful number, since it uses less digits than its factorization.

78776846416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4923552909 (or 4923552903 counting only the distinct ones).

The product of its digits is 75866112, while the sum is 64.

The spelling of 78776846416 in words is "seventy-eight billion, seven hundred seventy-six million, eight hundred forty-six thousand, four hundred sixteen".