25216026890777 has 2 divisors, whose sum is σ = 25216026890778. Its totient is φ = 25216026890776.

The previous prime is 25216026890699. The next prime is 25216026890801. The reversal of 25216026890777 is 77709862061252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24779926467136 + 436100423641 = 4977944^2 + 660379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25216026890777 is a prime.

It is not a weakly prime, because it can be changed into another prime (25216026890477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608013445388 + 12608013445389.

It is an arithmetic number, because the mean of its divisors is an integer number (12608013445389).

Almost surely, 2^{25216026890777} is an apocalyptic number.

It is an amenable number.

25216026890777 is a deficient number, since it is larger than the sum of its proper divisors (1).

25216026890777 is an equidigital number, since it uses as much as digits as its factorization.

25216026890777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35562240, while the sum is 62.

The spelling of 25216026890777 in words is "twenty-five trillion, two hundred sixteen billion, twenty-six million, eight hundred ninety thousand, seven hundred seventy-seven".