2745575681 has 2 divisors, whose sum is σ = 2745575682. Its totient is φ = 2745575680.

The previous prime is 2745575629. The next prime is 2745575689. The reversal of 2745575681 is 1865755472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2720665600 + 24910081 = 52160^2 + 4991^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745575681 - 2¹⁸ = 2745313537 is a prime.

It is a super-2 number, since 2×2745575681² = 15076371640197227522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2745575689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1372787840 + 1372787841.

It is an arithmetic number, because the mean of its divisors is an integer number (1372787841).

Almost surely, 2^2745575681 is an apocalyptic number.

It is an amenable number.

2745575681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2745575681 is an equidigital number, since it uses as much as digits as its factorization.

2745575681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352000, while the sum is 50.

The square root of 2745575681 is about 52398.2412013991. The cubic root of 2745575681 is about 1400.2679216830.

The spelling of 2745575681 in words is "two billion, seven hundred forty-five million, five hundred seventy-five thousand, six hundred eighty-one".