564420980978 has 4 divisors (see below), whose sum is σ = 846631471470. Its totient is φ = 282210490488.

The previous prime is 564420980957. The next prime is 564420981023. The reversal of 564420980978 is 879089024465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 454360927969 + 110060053009 = 674063^2 + 331753^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 564420980978.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141105245243 + ... + 141105245246.

Almost surely, 2^564420980978 is an apocalyptic number.

564420980978 is a deficient number, since it is larger than the sum of its proper divisors (282210490492).

564420980978 is a wasteful number, since it uses less digits than its factorization.

564420980978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282210490491.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 564420980978 in words is "five hundred sixty-four billion, four hundred twenty million, nine hundred eighty thousand, nine hundred seventy-eight".