405325816765 has 8 divisors (see below), whose sum is σ = 486436202208. Its totient is φ = 324230505360.

The previous prime is 405325816759. The next prime is 405325816769. The reversal of 405325816765 is 567618523504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405325816765 - 2²¹ = 405323719613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405325816769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3709267 + ... + 3816976.

It is an arithmetic number, because the mean of its divisors is an integer number (60804525276).

Almost surely, 2^405325816765 is an apocalyptic number.

It is an amenable number.

405325816765 is a deficient number, since it is larger than the sum of its proper divisors (81110385443).

405325816765 is a wasteful number, since it uses less digits than its factorization.

405325816765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7537019.

The product of its (nonzero) digits is 6048000, while the sum is 52.

The spelling of 405325816765 in words is "four hundred five billion, three hundred twenty-five million, eight hundred sixteen thousand, seven hundred sixty-five".