123664560535 has 32 divisors (see below), whose sum is σ = 152318880000. Its totient is φ = 96347736576.

The previous prime is 123664560527. The next prime is 123664560553. The reversal of 123664560535 is 535065466321.

It is a cyclic number.

It is not a de Polignac number, because 123664560535 - 2³ = 123664560527 is a prime.

It is a super-3 number, since 3×123664560535³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21176146 + ... + 21181984.

It is an arithmetic number, because the mean of its divisors is an integer number (4759965000).

Almost surely, 2^123664560535 is an apocalyptic number.

123664560535 is a deficient number, since it is larger than the sum of its proper divisors (28654319465).

123664560535 is a wasteful number, since it uses less digits than its factorization.

123664560535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475.

The product of its (nonzero) digits is 1944000, while the sum is 46.

The spelling of 123664560535 in words is "one hundred twenty-three billion, six hundred sixty-four million, five hundred sixty thousand, five hundred thirty-five".