2025757681 has 2 divisors, whose sum is σ = 2025757682. Its totient is φ = 2025757680.

The previous prime is 2025757639. The next prime is 2025757691. The reversal of 2025757681 is 1867575202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1392782400 + 632975281 = 37320^2 + 25159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025757681 - 2⁹ = 2025757169 is a prime.

It is a super-2 number, since 2×2025757681² = 8207388364260995522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2025757631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1012878840 + 1012878841.

It is an arithmetic number, because the mean of its divisors is an integer number (1012878841).

Almost surely, 2^2025757681 is an apocalyptic number.

It is an amenable number.

2025757681 is a deficient number, since it is larger than the sum of its proper divisors (1).

2025757681 is an equidigital number, since it uses as much as digits as its factorization.

2025757681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 2025757681 is about 45008.4178904347. The cubic root of 2025757681 is about 1265.3067691177.

The spelling of 2025757681 in words is "two billion, twenty-five million, seven hundred fifty-seven thousand, six hundred eighty-one".