3646521025 has 24 divisors (see below), whose sum is σ = 5196236864. Its totient is φ = 2486635200.

The previous prime is 3646521007. The next prime is 3646521031. The reversal of 3646521025 is 5201256463.

It is not a de Polignac number, because 3646521025 - 2⁹ = 3646520513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25887 + ... + 89236.

Almost surely, 2^3646521025 is an apocalyptic number.

3646521025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3646521025 is a deficient number, since it is larger than the sum of its proper divisors (1549715839).

3646521025 is a wasteful number, since it uses less digits than its factorization.

3646521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115321 (or 115316 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 3646521025 is about 60386.4308019608. The cubic root of 3646521025 is about 1539.1923894139.

Adding to 3646521025 its reverse (5201256463), we get a palindrome (8847777488).

The spelling of 3646521025 in words is "three billion, six hundred forty-six million, five hundred twenty-one thousand, twenty-five".