78685255854 has 48 divisors (see below), whose sum is σ = 180552518640. Its totient is φ = 24680198400.

The previous prime is 78685255849. The next prime is 78685255867. The reversal of 78685255854 is 45855258687.

It is a happy number.

78685255854 is a `hidden beast` number, since 7 + 8 + 6 + 8 + 525 + 58 + 54 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 78685255791 and 78685255800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1520152 + ... + 1571060.

It is an arithmetic number, because the mean of its divisors is an integer number (3761510805).

Almost surely, 2^78685255854 is an apocalyptic number.

78685255854 is an abundant number, since it is smaller than the sum of its proper divisors (101867262786).

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

78685255854 is a wasteful number, since it uses less digits than its factorization.

78685255854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55985 (or 55982 counting only the distinct ones).

The product of its digits is 107520000, while the sum is 63.

The spelling of 78685255854 in words is "seventy-eight billion, six hundred eighty-five million, two hundred fifty-five thousand, eight hundred fifty-four".