6521890325 has 6 divisors (see below), whose sum is σ = 8087144034. Its totient is φ = 5217512240.

The previous prime is 6521890321. The next prime is 6521890337. The reversal of 6521890325 is 5230981256.

It can be written as a sum of positive squares in 3 ways, for example, as 138839089 + 6383051236 = 11783^2 + 79894^2 .

It is not a de Polignac number, because 6521890325 - 2² = 6521890321 is a prime.

It is a super-2 number, since 2×6521890325² = 85070106822657211250, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521890321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130437782 + ... + 130437831.

It is an arithmetic number, because the mean of its divisors is an integer number (1347857339).

Almost surely, 2^6521890325 is an apocalyptic number.

It is an amenable number.

6521890325 is a deficient number, since it is larger than the sum of its proper divisors (1565253709).

6521890325 is a wasteful number, since it uses less digits than its factorization.

6521890325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260875623 (or 260875618 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 6521890325 is about 80758.2214081019. The cubic root of 6521890325 is about 1868.3482535897.

The spelling of 6521890325 in words is "six billion, five hundred twenty-one million, eight hundred ninety thousand, three hundred twenty-five".