326705132778 has 16 divisors (see below), whose sum is σ = 653415866496. Its totient is φ = 108900777440.

The previous prime is 326705132771. The next prime is 326705132783. The reversal of 326705132778 is 877231507623.

It is a self number, because there is not a number n which added to its sum of digits gives 326705132778.

It is not an unprimeable number, because it can be changed into a prime (326705132771) 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, 1261375 + ... + 1498157.

It is an arithmetic number, because the mean of its divisors is an integer number (40838491656).

Almost surely, 2^326705132778 is an apocalyptic number.

326705132778 is an abundant number, since it is smaller than the sum of its proper divisors (326710733718).

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

326705132778 is a wasteful number, since it uses less digits than its factorization.

326705132778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466749.

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 326705132778 in words is "three hundred twenty-six billion, seven hundred five million, one hundred thirty-two thousand, seven hundred seventy-eight".