25735718761 has 2 divisors, whose sum is σ = 25735718762. Its totient is φ = 25735718760.

The previous prime is 25735718713. The next prime is 25735718837. The reversal of 25735718761 is 16781753752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18260387161 + 7475331600 = 135131^2 + 86460^2 .

It is a cyclic number.

It is not a de Polignac number, because 25735718761 - 2³¹ = 23588235113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25735718699 and 25735718708.

It is not a weakly prime, because it can be changed into another prime (25735718161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12867859380 + 12867859381.

It is an arithmetic number, because the mean of its divisors is an integer number (12867859381).

Almost surely, 2^25735718761 is an apocalyptic number.

It is an amenable number.

25735718761 is a deficient number, since it is larger than the sum of its proper divisors (1).

25735718761 is an equidigital number, since it uses as much as digits as its factorization.

25735718761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469600, while the sum is 52.

The spelling of 25735718761 in words is "twenty-five billion, seven hundred thirty-five million, seven hundred eighteen thousand, seven hundred sixty-one".