2557355477 has 2 divisors, whose sum is σ = 2557355478. Its totient is φ = 2557355476.

The previous prime is 2557355473. The next prime is 2557355497. The reversal of 2557355477 is 7745537552.

2557355477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2544294481 + 13060996 = 50441^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557355477 - 2² = 2557355473 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557355473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278677738 + 1278677739.

It is an arithmetic number, because the mean of its divisors is an integer number (1278677739).

Almost surely, 2^2557355477 is an apocalyptic number.

It is an amenable number.

2557355477 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557355477 is an equidigital number, since it uses as much as digits as its factorization.

2557355477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5145000, while the sum is 50.

The square root of 2557355477 is about 50570.3023226083. The cubic root of 2557355477 is about 1367.5095460143.

The spelling of 2557355477 in words is "two billion, five hundred fifty-seven million, three hundred fifty-five thousand, four hundred seventy-seven".