780308220078 has 48 divisors (see below), whose sum is σ = 1802997509040. Its totient is φ = 243041395968.

The previous prime is 780308220071. The next prime is 780308220079. The reversal of 780308220078 is 870022803087.

780308220078 is a `hidden beast` number, since 78 + 0 + 308 + 2 + 200 + 78 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780308220071) 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, 9130225 + ... + 9215292.

It is an arithmetic number, because the mean of its divisors is an integer number (37562448105).

Almost surely, 2^780308220078 is an apocalyptic number.

780308220078 is an abundant number, since it is smaller than the sum of its proper divisors (1022689288962).

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

780308220078 is a wasteful number, since it uses less digits than its factorization.

780308220078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18345681 (or 18345678 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 780308220078 in words is "seven hundred eighty billion, three hundred eight million, two hundred twenty thousand, seventy-eight".