2558400949 has 4 divisors (see below), whose sum is σ = 2755201036. Its totient is φ = 2361600864.

The previous prime is 2558400947. The next prime is 2558400973. The reversal of 2558400949 is 9490048552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1483020100 + 1075380849 = 38510^2 + 32793^2 .

It is a cyclic number.

It is not a de Polignac number, because 2558400949 - 2¹ = 2558400947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2558400899 and 2558400908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2558400947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98400024 + ... + 98400049.

It is an arithmetic number, because the mean of its divisors is an integer number (688800259).

Almost surely, 2^2558400949 is an apocalyptic number.

It is an amenable number.

2558400949 is a deficient number, since it is larger than the sum of its proper divisors (196800087).

2558400949 is a wasteful number, since it uses less digits than its factorization.

2558400949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196800086.

The product of its (nonzero) digits is 518400, while the sum is 46.

The square root of 2558400949 is about 50580.6380841523. The cubic root of 2558400949 is about 1367.6958710642.

The spelling of 2558400949 in words is "two billion, five hundred fifty-eight million, four hundred thousand, nine hundred forty-nine".