1664124543 has 48 divisors (see below), whose sum is σ = 2727781056. Its totient is φ = 971688960.

The previous prime is 1664124533. The next prime is 1664124569. The reversal of 1664124543 is 3454214661.

1664124543 is a `hidden beast` number, since 1 + 6 + 641 + 2 + 4 + 5 + 4 + 3 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1664124543 is a prime.

It is a super-2 number, since 2×1664124543² = 5538620989229917698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1664124498 and 1664124507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664124533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123813 + ... + 136593.

It is an arithmetic number, because the mean of its divisors is an integer number (56828772).

Almost surely, 2^1664124543 is an apocalyptic number.

1664124543 is a deficient number, since it is larger than the sum of its proper divisors (1063656513).

1664124543 is a wasteful number, since it uses less digits than its factorization.

1664124543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12864 (or 12861 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 1664124543 is about 40793.6826359180. The cubic root of 1664124543 is about 1185.0279905796.

The spelling of 1664124543 in words is "one billion, six hundred sixty-four million, one hundred twenty-four thousand, five hundred forty-three".