123664362543 has 12 divisors (see below), whose sum is σ = 179764050648. Its totient is φ = 81917793360.

The previous prime is 123664362517. The next prime is 123664362551. The reversal of 123664362543 is 345263466321.

123664362543 is a `hidden beast` number, since 1 + 2 + 3 + 6 + 6 + 43 + 62 + 543 = 666.

It is not a de Polignac number, because 123664362543 - 2¹⁶ = 123664297007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123664322543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43758093 + ... + 43760918.

It is an arithmetic number, because the mean of its divisors is an integer number (14980337554).

Almost surely, 2^123664362543 is an apocalyptic number.

123664362543 is a deficient number, since it is larger than the sum of its proper divisors (56099688105).

123664362543 is a wasteful number, since it uses less digits than its factorization.

123664362543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87519174 (or 87519171 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

The spelling of 123664362543 in words is "one hundred twenty-three billion, six hundred sixty-four million, three hundred sixty-two thousand, five hundred forty-three".