405540230525 has 6 divisors (see below), whose sum is σ = 502869885882. Its totient is φ = 324432184400.

The previous prime is 405540230497. The next prime is 405540230533. The reversal of 405540230525 is 525032045504.

It can be written as a sum of positive squares in 3 ways, for example, as 182628196 + 405357602329 = 13514^2 + 636677^2 .

It is not a de Polignac number, because 405540230525 - 2¹⁶ = 405540164989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8110804586 + ... + 8110804635.

It is an arithmetic number, because the mean of its divisors is an integer number (83811647647).

Almost surely, 2^405540230525 is an apocalyptic number.

It is an amenable number.

405540230525 is a deficient number, since it is larger than the sum of its proper divisors (97329655357).

405540230525 is a wasteful number, since it uses less digits than its factorization.

405540230525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16221609231 (or 16221609226 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 35.

The spelling of 405540230525 in words is "four hundred five billion, five hundred forty million, two hundred thirty thousand, five hundred twenty-five".