78534858856 has 32 divisors (see below), whose sum is σ = 155326752000. Its totient is φ = 37123024896.

The previous prime is 78534858851. The next prime is 78534859003. The reversal of 78534858856 is 65885843587.

It is a junction number, because it is equal to n+sod(n) for n = 78534858791 and 78534858800.

It is not an unprimeable number, because it can be changed into a prime (78534858851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466521 + ... + 612136.

It is an arithmetic number, because the mean of its divisors is an integer number (4853961000).

Almost surely, 2^78534858856 is an apocalyptic number.

78534858856 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

78534858856 is a deficient number, since it is larger than the sum of its proper divisors (76791893144).

78534858856 is a wasteful number, since it uses less digits than its factorization.

78534858856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079161 (or 1079157 counting only the distinct ones).

The product of its digits is 258048000, while the sum is 67.

The spelling of 78534858856 in words is "seventy-eight billion, five hundred thirty-four million, eight hundred fifty-eight thousand, eight hundred fifty-six".