523405232345 has 8 divisors (see below), whose sum is σ = 638382775560. Its totient is φ = 411859854720.

The previous prime is 523405232341. The next prime is 523405232347. The reversal of 523405232345 is 543232504325.

It can be written as a sum of positive squares in 4 ways, for example, as 9476827801 + 513928404544 = 97349^2 + 716888^2 .

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

It is not a de Polignac number, because 523405232345 - 2² = 523405232341 is a prime.

It is a super-2 number, since 2×523405232345² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 523405232299 and 523405232308.

It is not an unprimeable number, because it can be changed into a prime (523405232341) 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, 858041060 + ... + 858041669.

It is an arithmetic number, because the mean of its divisors is an integer number (79797846945).

Almost surely, 2^523405232345 is an apocalyptic number.

It is an amenable number.

523405232345 is a deficient number, since it is larger than the sum of its proper divisors (114977543215).

523405232345 is a wasteful number, since it uses less digits than its factorization.

523405232345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716082795.

The product of its (nonzero) digits is 432000, while the sum is 38.

The spelling of 523405232345 in words is "five hundred twenty-three billion, four hundred five million, two hundred thirty-two thousand, three hundred forty-five".