858080557 has 2 divisors, whose sum is σ = 858080558. Its totient is φ = 858080556.

The previous prime is 858080549. The next prime is 858080581. The reversal of 858080557 is 755080858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787419721 + 70660836 = 28061^2 + 8406^2 .

It is a cyclic number.

It is not a de Polignac number, because 858080557 - 2³ = 858080549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858080057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429040278 + 429040279.

It is an arithmetic number, because the mean of its divisors is an integer number (429040279).

Almost surely, 2^858080557 is an apocalyptic number.

It is an amenable number.

858080557 is a deficient number, since it is larger than the sum of its proper divisors (1).

858080557 is an equidigital number, since it uses as much as digits as its factorization.

858080557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448000, while the sum is 46.

The square root of 858080557 is about 29293.0120847959. The cubic root of 858080557 is about 950.2605220860.

The spelling of 858080557 in words is "eight hundred fifty-eight million, eighty thousand, five hundred fifty-seven".