25020885104581 has 2 divisors, whose sum is σ = 25020885104582. Its totient is φ = 25020885104580.

The previous prime is 25020885104563. The next prime is 25020885104587. The reversal of 25020885104581 is 18540158802052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20700598143681 + 4320286960900 = 4549791^2 + 2078530^2 .

It is a cyclic number.

It is not a de Polignac number, because 25020885104581 - 2¹⁷ = 25020884973509 is a prime.

It is a super-2 number, since 2×25020885104581² (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 (25020885104587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12510442552290 + 12510442552291.

It is an arithmetic number, because the mean of its divisors is an integer number (12510442552291).

Almost surely, 2^{25020885104581} is an apocalyptic number.

It is an amenable number.

25020885104581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25020885104581 is an equidigital number, since it uses as much as digits as its factorization.

25020885104581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024000, while the sum is 49.

The spelling of 25020885104581 in words is "twenty-five trillion, twenty billion, eight hundred eighty-five million, one hundred four thousand, five hundred eighty-one".