2539809025 has 24 divisors (see below), whose sum is σ = 3455638200. Its totient is φ = 1840151040.

The previous prime is 2539809023. The next prime is 2539809029. The reversal of 2539809025 is 5209089352.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 1787513841 + 752295184 = 42279^2 + 27428^2 .

It is not a de Polignac number, because 2539809025 - 2¹ = 2539809023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2539809023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56500 + ... + 90949.

It is an arithmetic number, because the mean of its divisors is an integer number (143984925).

Almost surely, 2^2539809025 is an apocalyptic number.

2539809025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2539809025 is a deficient number, since it is larger than the sum of its proper divisors (915829175).

2539809025 is a wasteful number, since it uses less digits than its factorization.

2539809025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147525 (or 147520 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 2539809025 is about 50396.5179848767. The cubic root of 2539809025 is about 1364.3747936291.

The spelling of 2539809025 in words is "two billion, five hundred thirty-nine million, eight hundred nine thousand, twenty-five".