25361172877 has 2 divisors, whose sum is σ = 25361172878. Its totient is φ = 25361172876.

The previous prime is 25361172853. The next prime is 25361172919. The reversal of 25361172877 is 77827116352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18488928676 + 6872244201 = 135974^2 + 82899^2 .

It is a cyclic number.

It is not a de Polignac number, because 25361172877 - 2¹¹ = 25361170829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25361172877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25361172677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12680586438 + 12680586439.

It is an arithmetic number, because the mean of its divisors is an integer number (12680586439).

Almost surely, 2^25361172877 is an apocalyptic number.

It is an amenable number.

25361172877 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361172877 is an equidigital number, since it uses as much as digits as its factorization.

25361172877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987840, while the sum is 49.

The spelling of 25361172877 in words is "twenty-five billion, three hundred sixty-one million, one hundred seventy-two thousand, eight hundred seventy-seven".