25440710377 has 2 divisors, whose sum is σ = 25440710378. Its totient is φ = 25440710376.

The previous prime is 25440710363. The next prime is 25440710401. The reversal of 25440710377 is 77301704452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25440569001 + 141376 = 159501^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 25440710377 - 2¹¹ = 25440708329 is a prime.

It is not a weakly prime, because it can be changed into another prime (25440710177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720355188 + 12720355189.

It is an arithmetic number, because the mean of its divisors is an integer number (12720355189).

Almost surely, 2^25440710377 is an apocalyptic number.

It is an amenable number.

25440710377 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440710377 is an equidigital number, since it uses as much as digits as its factorization.

25440710377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 164640, while the sum is 40.

The spelling of 25440710377 in words is "twenty-five billion, four hundred forty million, seven hundred ten thousand, three hundred seventy-seven".