618318506778 has 32 divisors (see below), whose sum is σ = 1451496729984. Its totient is φ = 171887769792.

The previous prime is 618318506747. The next prime is 618318506851. The reversal of 618318506778 is 877605813816.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198942625 + ... + 198945732.

It is an arithmetic number, because the mean of its divisors is an integer number (45359272812).

Almost surely, 2^618318506778 is an apocalyptic number.

618318506778 is an abundant number, since it is smaller than the sum of its proper divisors (833178223206).

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

618318506778 is a wasteful number, since it uses less digits than its factorization.

618318506778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397888406.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 618318506778 in words is "six hundred eighteen billion, three hundred eighteen million, five hundred six thousand, seven hundred seventy-eight".