2525801989 has 2 divisors, whose sum is σ = 2525801990. Its totient is φ = 2525801988.

The previous prime is 2525801981. The next prime is 2525802053. The reversal of 2525801989 is 9891085252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2474565025 + 51236964 = 49745^2 + 7158^2 .

It is a cyclic number.

It is not a de Polignac number, because 2525801989 - 2³ = 2525801981 is a prime.

It is a super-2 number, since 2×2525801989² = 12759351375272712242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2525801981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262900994 + 1262900995.

It is an arithmetic number, because the mean of its divisors is an integer number (1262900995).

Almost surely, 2^2525801989 is an apocalyptic number.

It is an amenable number.

2525801989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2525801989 is an equidigital number, since it uses as much as digits as its factorization.

2525801989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 518400, while the sum is 49.

The square root of 2525801989 is about 50257.3575608587. The cubic root of 2525801989 is about 1361.8619948607.

The spelling of 2525801989 in words is "two billion, five hundred twenty-five million, eight hundred one thousand, nine hundred eighty-nine".