2257764857 has 2 divisors, whose sum is σ = 2257764858. Its totient is φ = 2257764856.

The previous prime is 2257764853. The next prime is 2257764931. The reversal of 2257764857 is 7584677522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1434591376 + 823173481 = 37876^2 + 28691^2 .

It is a cyclic number.

It is not a de Polignac number, because 2257764857 - 2² = 2257764853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2257764799 and 2257764808.

It is not a weakly prime, because it can be changed into another prime (2257764853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128882428 + 1128882429.

It is an arithmetic number, because the mean of its divisors is an integer number (1128882429).

Almost surely, 2^2257764857 is an apocalyptic number.

It is an amenable number.

2257764857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257764857 is an equidigital number, since it uses as much as digits as its factorization.

2257764857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6585600, while the sum is 53.

The square root of 2257764857 is about 47515.9431875239. The cubic root of 2257764857 is about 1311.8763502673.

The spelling of 2257764857 in words is "two billion, two hundred fifty-seven million, seven hundred sixty-four thousand, eight hundred fifty-seven".