78455414478 has 16 divisors (see below), whose sum is σ = 179326661760. Its totient is φ = 22415832696.

The previous prime is 78455414473. The next prime is 78455414491. The reversal of 78455414478 is 87441455487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78455414473) 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, 933992988 + ... + 933993071.

It is an arithmetic number, because the mean of its divisors is an integer number (11207916360).

Almost surely, 2^78455414478 is an apocalyptic number.

78455414478 is an abundant number, since it is smaller than the sum of its proper divisors (100871247282).

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

78455414478 is a wasteful number, since it uses less digits than its factorization.

78455414478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867986071.

The product of its digits is 20070400, while the sum is 57.

The spelling of 78455414478 in words is "seventy-eight billion, four hundred fifty-five million, four hundred fourteen thousand, four hundred seventy-eight".