523961385169 has 4 divisors (see below), whose sum is σ = 525445695396. Its totient is φ = 522477074944.

The previous prime is 523961385151. The next prime is 523961385179. The reversal of 523961385169 is 961583169325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 327613140625 + 196348244544 = 572375^2 + 443112^2 .

It is a cyclic number.

It is not a de Polignac number, because 523961385169 - 2¹³ = 523961376977 is a prime.

It is a super-2 number, since 2×523961385169² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523961385179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742154584 + ... + 742155289.

It is an arithmetic number, because the mean of its divisors is an integer number (131361423849).

Almost surely, 2^523961385169 is an apocalyptic number.

It is an amenable number.

523961385169 is a deficient number, since it is larger than the sum of its proper divisors (1484310227).

523961385169 is a wasteful number, since it uses less digits than its factorization.

523961385169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484310226.

The product of its digits is 10497600, while the sum is 58.

The spelling of 523961385169 in words is "five hundred twenty-three billion, nine hundred sixty-one million, three hundred eighty-five thousand, one hundred sixty-nine".