2520545779 has 4 divisors (see below), whose sum is σ = 2521107576. Its totient is φ = 2519983984.

The previous prime is 2520545777. The next prime is 2520545789. The reversal of 2520545779 is 9775450252.

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 2520545779 - 2¹ = 2520545777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520545777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274114 + ... + 283159.

It is an arithmetic number, because the mean of its divisors is an integer number (630276894).

Almost surely, 2^2520545779 is an apocalyptic number.

2520545779 is a deficient number, since it is larger than the sum of its proper divisors (561797).

2520545779 is an equidigital number, since it uses as much as digits as its factorization.

2520545779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561796.

The product of its (nonzero) digits is 882000, while the sum is 46.

The square root of 2520545779 is about 50205.0373867006. The cubic root of 2520545779 is about 1360.9166576492.

The spelling of 2520545779 in words is "two billion, five hundred twenty million, five hundred forty-five thousand, seven hundred seventy-nine".