2506005857 has 4 divisors (see below), whose sum is σ = 2510988480. Its totient is φ = 2501023236.

The previous prime is 2506005833. The next prime is 2506005881. The reversal of 2506005857 is 7585006052.

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 an interprime number because it is at equal distance from previous prime (2506005833) and next prime (2506005881).

It is a cyclic number.

It is not a de Polignac number, because 2506005857 - 2⁶ = 2506005793 is a prime.

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 2506005857.

It is not an unprimeable number, because it can be changed into a prime (2506007857) 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, 2490557 + ... + 2491562.

It is an arithmetic number, because the mean of its divisors is an integer number (627747120).

Almost surely, 2^2506005857 is an apocalyptic number.

It is an amenable number.

2506005857 is a deficient number, since it is larger than the sum of its proper divisors (4982623).

2506005857 is an equidigital number, since it uses as much as digits as its factorization.

2506005857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4982622.

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 2506005857 is about 50060.0225429434. The cubic root of 2506005857 is about 1358.2947660831.

The spelling of 2506005857 in words is "two billion, five hundred six million, five thousand, eight hundred fifty-seven".