2556705377 has 4 divisors (see below), whose sum is σ = 2639179776. Its totient is φ = 2474230980.

The previous prime is 2556705373. The next prime is 2556705391. The reversal of 2556705377 is 7735076552.

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 a cyclic number.

It is not a de Polignac number, because 2556705377 - 2² = 2556705373 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556705373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41237153 + ... + 41237214.

It is an arithmetic number, because the mean of its divisors is an integer number (659794944).

Almost surely, 2^2556705377 is an apocalyptic number.

It is an amenable number.

2556705377 is a deficient number, since it is larger than the sum of its proper divisors (82474399).

2556705377 is an equidigital number, since it uses as much as digits as its factorization.

2556705377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82474398.

The product of its (nonzero) digits is 1543500, while the sum is 47.

The square root of 2556705377 is about 50563.8742285438. The cubic root of 2556705377 is about 1367.3936589445.

The spelling of 2556705377 in words is "two billion, five hundred fifty-six million, seven hundred five thousand, three hundred seventy-seven".