6405516425 has 96 divisors (see below), whose sum is σ = 10285056000. Its totient is φ = 3921960000.

The previous prime is 6405516421. The next prime is 6405516427. The reversal of 6405516425 is 5246155046.

It is not a de Polignac number, because 6405516425 - 2² = 6405516421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405516421) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5564600 + ... + 5565750.

It is an arithmetic number, because the mean of its divisors is an integer number (107136000).

Almost surely, 2^6405516425 is an apocalyptic number.

It is an amenable number.

6405516425 is a deficient number, since it is larger than the sum of its proper divisors (3879539575).

6405516425 is a wasteful number, since it uses less digits than its factorization.

6405516425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1233 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The square root of 6405516425 is about 80034.4702300203. The cubic root of 6405516425 is about 1857.1688172688.

The spelling of 6405516425 in words is "six billion, four hundred five million, five hundred sixteen thousand, four hundred twenty-five".