2445566778 has 24 divisors (see below), whose sum is σ = 5421955968. Its totient is φ = 796230792.

The previous prime is 2445566771. The next prime is 2445566869. The reversal of 2445566778 is 8776655442.

It is a happy number.

2445566778 is a `hidden beast` number, since 2 + 4 + 4 + 5 + 566 + 7 + 78 = 666.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2445566771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1579050 + ... + 1580597.

It is an arithmetic number, because the mean of its divisors is an integer number (225914832).

Almost surely, 2^2445566778 is an apocalyptic number.

2445566778 is an abundant number, since it is smaller than the sum of its proper divisors (2976389190).

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

2445566778 is a wasteful number, since it uses less digits than its factorization.

2445566778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159698 (or 3159695 counting only the distinct ones).

The product of its digits is 11289600, while the sum is 54.

The square root of 2445566778 is about 49452.6721017176. The cubic root of 2445566778 is about 1347.2861398423.

The spelling of 2445566778 in words is "two billion, four hundred forty-five million, five hundred sixty-six thousand, seven hundred seventy-eight".