242794678564 has 9 divisors (see below), whose sum is σ = 424892412091. Its totient is φ = 121396846540.

The previous prime is 242794678561. The next prime is 242794678571. The reversal of 242794678564 is 465876497242.

The square root of 242794678564 is 492742.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×242794678564² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242794678496 and 242794678505.

It is not an unprimeable number, because it can be changed into a prime (242794678561) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 862299 + ... + 1108669.

Almost surely, 2^242794678564 is an apocalyptic number.

242794678564 is the 492742-nd square number.

It is an amenable number.

242794678564 is a deficient number, since it is larger than the sum of its proper divisors (182097733527).

242794678564 is an frugal number, since it uses more digits than its factorization.

242794678564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492746 (or 246373 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 64.

Multiplying 242794678564 by its sum of digits (64), we get a square (15538859428096 = 3941936²).

The spelling of 242794678564 in words is "two hundred forty-two billion, seven hundred ninety-four million, six hundred seventy-eight thousand, five hundred sixty-four".