78855427144566 has 12 divisors (see below), whose sum is σ = 170853425479932. Its totient is φ = 26285142381516.

The previous prime is 78855427144547. The next prime is 78855427144631. The reversal of 78855427144566 is 66544172455887.

78855427144566 is a `hidden beast` number, since 7 + 8 + 8 + 5 + 5 + 42 + 7 + 14 + 4 + 566 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 78855427144494 and 78855427144503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2190428531776 + ... + 2190428531811.

It is an arithmetic number, because the mean of its divisors is an integer number (14237785456661).

Almost surely, 2^{78855427144566} is an apocalyptic number.

78855427144566 is an abundant number, since it is smaller than the sum of its proper divisors (91997998335366).

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

78855427144566 is a wasteful number, since it uses less digits than its factorization.

78855427144566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4380857063595 (or 4380857063592 counting only the distinct ones).

The product of its digits is 1806336000, while the sum is 72.

The spelling of 78855427144566 in words is "seventy-eight trillion, eight hundred fifty-five billion, four hundred twenty-seven million, one hundred forty-four thousand, five hundred sixty-six".