25054548077521 has 2 divisors, whose sum is σ = 25054548077522. Its totient is φ = 25054548077520.

The previous prime is 25054548077483. The next prime is 25054548077623. The reversal of 25054548077521 is 12577084545052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13668215673025 + 11386332404496 = 3697055^2 + 3374364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25054548077521 is a prime.

It is a super-2 number, since 2×25054548077521² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25054548477521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12527274038760 + 12527274038761.

It is an arithmetic number, because the mean of its divisors is an integer number (12527274038761).

Almost surely, 2^{25054548077521} is an apocalyptic number.

It is an amenable number.

25054548077521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25054548077521 is an equidigital number, since it uses as much as digits as its factorization.

25054548077521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680000, while the sum is 55.

The spelling of 25054548077521 in words is "twenty-five trillion, fifty-four billion, five hundred forty-eight million, seventy-seven thousand, five hundred twenty-one".