78208785378 has 48 divisors (see below), whose sum is σ = 178514700000. Its totient is φ = 24677602560.

The previous prime is 78208785377. The next prime is 78208785407. The reversal of 78208785378 is 87358780287.

78208785378 is a `hidden beast` number, since 7 + 8 + 20 + 8 + 78 + 537 + 8 = 666.

It is a super-2 number, since 2×78208785378² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78208785377) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335613 + ... + 518703.

It is an arithmetic number, because the mean of its divisors is an integer number (3719056250).

Almost surely, 2^78208785378 is an apocalyptic number.

78208785378 is an abundant number, since it is smaller than the sum of its proper divisors (100305914622).

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

78208785378 is a wasteful number, since it uses less digits than its factorization.

78208785378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184367 (or 184364 counting only the distinct ones).

The product of its (nonzero) digits is 42147840, while the sum is 63.

The spelling of 78208785378 in words is "seventy-eight billion, two hundred eight million, seven hundred eighty-five thousand, three hundred seventy-eight".