2558278057 has 4 divisors (see below), whose sum is σ = 2558421136. Its totient is φ = 2558134980.

The previous prime is 2558278049. The next prime is 2558278061. The reversal of 2558278057 is 7508728552.

2558278057 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2558278057 - 2³ = 2558278049 is a prime.

It is a super-4 number, since 4×2558278057⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2558278057.

It is not an unprimeable number, because it can be changed into a prime (2558278067) 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, 40119 + ... + 82012.

It is an arithmetic number, because the mean of its divisors is an integer number (639605284).

Almost surely, 2^2558278057 is an apocalyptic number.

It is an amenable number.

2558278057 is a deficient number, since it is larger than the sum of its proper divisors (143079).

2558278057 is a wasteful number, since it uses less digits than its factorization.

2558278057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143078.

The product of its (nonzero) digits is 1568000, while the sum is 49.

The square root of 2558278057 is about 50579.4232568937. The cubic root of 2558278057 is about 1367.6739717638.

The spelling of 2558278057 in words is "two billion, five hundred fifty-eight million, two hundred seventy-eight thousand, fifty-seven".