2557172858 has 8 divisors (see below), whose sum is σ = 3857931828. Its totient is φ = 1271195584.

The previous prime is 2557172837. The next prime is 2557172869. The reversal of 2557172858 is 8582717552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2360696569 + 196476289 = 48587^2 + 14017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×2557172858⁴ (a number of 39 digits) contains 4444 as substring.

It is an unprimeable number.

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, 3694991 + ... + 3695682.

Almost surely, 2^2557172858 is an apocalyptic number.

2557172858 is a deficient number, since it is larger than the sum of its proper divisors (1300758970).

2557172858 is a wasteful number, since it uses less digits than its factorization.

2557172858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390848.

The product of its digits is 1568000, while the sum is 50.

The square root of 2557172858 is about 50568.4966950769. The cubic root of 2557172858 is about 1367.4769942667.

The spelling of 2557172858 in words is "two billion, five hundred fifty-seven million, one hundred seventy-two thousand, eight hundred fifty-eight".