25250002777789 has 2 divisors, whose sum is σ = 25250002777790. Its totient is φ = 25250002777788.

The previous prime is 25250002777757. The next prime is 25250002777807. The reversal of 25250002777789 is 98777720005252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24641395280100 + 608607497689 = 4964010^2 + 780133^2 .

It is a cyclic number.

It is not a de Polignac number, because 25250002777789 - 2⁵ = 25250002777757 is a prime.

It is a super-2 number, since 2×25250002777789² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25250002771789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12625001388894 + 12625001388895.

It is an arithmetic number, because the mean of its divisors is an integer number (12625001388895).

Almost surely, 2^{25250002777789} is an apocalyptic number.

It is an amenable number.

25250002777789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25250002777789 is an equidigital number, since it uses as much as digits as its factorization.

25250002777789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34574400, while the sum is 61.

The spelling of 25250002777789 in words is "twenty-five trillion, two hundred fifty billion, two million, seven hundred seventy-seven thousand, seven hundred eighty-nine".