245343506405 has 16 divisors (see below), whose sum is σ = 311986851120. Its totient is φ = 184577359872.

The previous prime is 245343506381. The next prime is 245343506407. The reversal of 245343506405 is 504605343542.

It can be written as a sum of positive squares in 8 ways, for example, as 15666777889 + 229676728516 = 125167^2 + 479246^2 .

It is a cyclic number.

It is not a de Polignac number, because 245343506405 - 2¹⁸ = 245343244261 is a prime.

It is a super-2 number, since 2×245343506405² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245343506407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1082420 + ... + 1289309.

It is an arithmetic number, because the mean of its divisors is an integer number (19499178195).

Almost surely, 2^245343506405 is an apocalyptic number.

It is an amenable number.

245343506405 is a deficient number, since it is larger than the sum of its proper divisors (66643344715).

245343506405 is a wasteful number, since it uses less digits than its factorization.

245343506405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372968.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 245343506405 its reverse (504605343542), we get a palindrome (749948849947).

The spelling of 245343506405 in words is "two hundred forty-five billion, three hundred forty-three million, five hundred six thousand, four hundred five".