2557780833 has 4 divisors (see below), whose sum is σ = 3410374448. Its totient is φ = 1705187220.

The previous prime is 2557780801. The next prime is 2557780853. The reversal of 2557780833 is 3380877552.

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 not a de Polignac number, because 2557780833 - 2⁵ = 2557780801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2557780853) 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, 426296803 + ... + 426296808.

It is an arithmetic number, because the mean of its divisors is an integer number (852593612).

Almost surely, 2^2557780833 is an apocalyptic number.

It is an amenable number.

2557780833 is a deficient number, since it is larger than the sum of its proper divisors (852593615).

2557780833 is an equidigital number, since it uses as much as digits as its factorization.

2557780833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852593614.

The product of its (nonzero) digits is 1411200, while the sum is 48.

The square root of 2557780833 is about 50574.5077385831. The cubic root of 2557780833 is about 1367.5853595059.

The spelling of 2557780833 in words is "two billion, five hundred fifty-seven million, seven hundred eighty thousand, eight hundred thirty-three".