78441553776 has 20 divisors (see below), whose sum is σ = 202640680712. Its totient is φ = 26147184576.

The previous prime is 78441553759. The next prime is 78441553777. The reversal of 78441553776 is 67735514487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78441553777) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 817099471 + ... + 817099566.

Almost surely, 2^78441553776 is an apocalyptic number.

It is an amenable number.

78441553776 is an abundant number, since it is smaller than the sum of its proper divisors (124199126936).

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

78441553776 is a wasteful number, since it uses less digits than its factorization.

78441553776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634199048 (or 1634199042 counting only the distinct ones).

The product of its digits is 19756800, while the sum is 57.

The spelling of 78441553776 in words is "seventy-eight billion, four hundred forty-one million, five hundred fifty-three thousand, seven hundred seventy-six".