78526378556 has 12 divisors (see below), whose sum is σ = 143395995792. Its totient is φ = 37556094048.

The previous prime is 78526378549. The next prime is 78526378589. The reversal of 78526378556 is 65587362587.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426773705 + ... + 426773888.

It is an arithmetic number, because the mean of its divisors is an integer number (11949666316).

Almost surely, 2^78526378556 is an apocalyptic number.

It is an amenable number.

78526378556 is a deficient number, since it is larger than the sum of its proper divisors (64869617236).

78526378556 is a wasteful number, since it uses less digits than its factorization.

78526378556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853547620 (or 853547618 counting only the distinct ones).

The product of its digits is 84672000, while the sum is 62.

The spelling of 78526378556 in words is "seventy-eight billion, five hundred twenty-six million, three hundred seventy-eight thousand, five hundred fifty-six".