1664124436 has 24 divisors (see below), whose sum is σ = 3174028704. Its totient is φ = 758801760.

The previous prime is 1664124421. The next prime is 1664124437. The reversal of 1664124436 is 6344214661.

It is a junction number, because it is equal to n+sod(n) for n = 1664124395 and 1664124404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664124437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188470 + ... + 197101.

It is an arithmetic number, because the mean of its divisors is an integer number (132251196).

Almost surely, 2^1664124436 is an apocalyptic number.

It is an amenable number.

1664124436 is a deficient number, since it is larger than the sum of its proper divisors (1509904268).

1664124436 is a wasteful number, since it uses less digits than its factorization.

1664124436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385671 (or 385669 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 1664124436 is about 40793.6813244404. The cubic root of 1664124436 is about 1185.0279651812.

The spelling of 1664124436 in words is "one billion, six hundred sixty-four million, one hundred twenty-four thousand, four hundred thirty-six".