2455557779 has 4 divisors (see below), whose sum is σ = 2455701984. Its totient is φ = 2455413576.

The previous prime is 2455557761. The next prime is 2455557821. The reversal of 2455557779 is 9777555542.

2455557779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2455557779 - 2²⁰ = 2454509203 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2455557749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42512 + ... + 81965.

It is an arithmetic number, because the mean of its divisors is an integer number (613925496).

Almost surely, 2^2455557779 is an apocalyptic number.

2455557779 is a deficient number, since it is larger than the sum of its proper divisors (144205).

2455557779 is a wasteful number, since it uses less digits than its factorization.

2455557779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144204.

The product of its digits is 15435000, while the sum is 56.

The square root of 2455557779 is about 49553.5849258154. The cubic root of 2455557779 is about 1349.1183597005.

The spelling of 2455557779 in words is "two billion, four hundred fifty-five million, five hundred fifty-seven thousand, seven hundred seventy-nine".