2558718720 has 720 divisors, whose sum is σ = 10150176960. Its totient is φ = 613122048.

The previous prime is 2558718689. The next prime is 2558718727. The reversal of 2558718720 is 278178552.

2558718720 is a `hidden beast` number, since 2 + 558 + 71 + 8 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2558718727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 69154542 + ... + 69154578.

It is an arithmetic number, because the mean of its divisors is an integer number (14097468).

Almost surely, 2^2558718720 is an apocalyptic number.

2558718720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2558718720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5075088480).

2558718720 is an abundant number, since it is smaller than the sum of its proper divisors (7591458240).

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

2558718720 is a wasteful number, since it uses less digits than its factorization.

2558718720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 2558718720 is about 50583.7792182435. The cubic root of 2558718720 is about 1367.7524944656.

The spelling of 2558718720 in words is "two billion, five hundred fifty-eight million, seven hundred eighteen thousand, seven hundred twenty".