2445556779 has 20 divisors (see below), whose sum is σ = 3655743960. Its totient is φ = 1629253440.

The previous prime is 2445556739. The next prime is 2445556801. The reversal of 2445556779 is 9776555442.

It is a happy number.

2445556779 is a `hidden beast` number, since 2 + 4 + 4 + 5 + 5 + 567 + 79 = 666.

It is not a de Polignac number, because 2445556779 - 2⁷ = 2445556651 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2445556739) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 118339 + ... + 137459.

It is an arithmetic number, because the mean of its divisors is an integer number (182787198).

Almost surely, 2^2445556779 is an apocalyptic number.

2445556779 is a deficient number, since it is larger than the sum of its proper divisors (1210187181).

2445556779 is a wasteful number, since it uses less digits than its factorization.

2445556779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20712 (or 20703 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 54.

The square root of 2445556779 is about 49452.5710049538. The cubic root of 2445556779 is about 1347.2843036582.

The spelling of 2445556779 in words is "two billion, four hundred forty-five million, five hundred fifty-six thousand, seven hundred seventy-nine".