2557780085 has 32 divisors (see below), whose sum is σ = 3625869312. Its totient is φ = 1695032640.

The previous prime is 2557780079. The next prime is 2557780097. The reversal of 2557780085 is 5800877552.

It is not a de Polignac number, because 2557780085 - 2²² = 2553585781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260842 + ... + 1262868.

It is an arithmetic number, because the mean of its divisors is an integer number (113308416).

Almost surely, 2^2557780085 is an apocalyptic number.

It is an amenable number.

2557780085 is a deficient number, since it is larger than the sum of its proper divisors (1068089227).

2557780085 is a wasteful number, since it uses less digits than its factorization.

2557780085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233.

The product of its (nonzero) digits is 784000, while the sum is 47.

The square root of 2557780085 is about 50574.5003435526. The cubic root of 2557780085 is about 1367.5852261932.

The spelling of 2557780085 in words is "two billion, five hundred fifty-seven million, seven hundred eighty thousand, eighty-five".