2025604981 has 2 divisors, whose sum is σ = 2025604982. Its totient is φ = 2025604980.

The previous prime is 2025604943. The next prime is 2025604993. The reversal of 2025604981 is 1894065202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1743062500 + 282542481 = 41750^2 + 16809^2 .

It is a cyclic number.

It is not a de Polignac number, because 2025604981 - 2¹⁹ = 2025080693 is a prime.

It is a super-2 number, since 2×2025604981² = 8206151078104020722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2025604981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2025604381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1012802490 + 1012802491.

It is an arithmetic number, because the mean of its divisors is an integer number (1012802491).

Almost surely, 2^2025604981 is an apocalyptic number.

It is an amenable number.

2025604981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2025604981 is an equidigital number, since it uses as much as digits as its factorization.

2025604981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 2025604981 is about 45006.7215091257. The cubic root of 2025604981 is about 1265.2749757134.

The spelling of 2025604981 in words is "two billion, twenty-five million, six hundred four thousand, nine hundred eighty-one".