1664124542 has 4 divisors (see below), whose sum is σ = 2496186816. Its totient is φ = 832062270.

The previous prime is 1664124533. The next prime is 1664124569. The reversal of 1664124542 is 2454214661.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 416031134 + ... + 416031137.

It is an arithmetic number, because the mean of its divisors is an integer number (624046704).

Almost surely, 2^1664124542 is an apocalyptic number.

1664124542 is a deficient number, since it is larger than the sum of its proper divisors (832062274).

1664124542 is an equidigital number, since it uses as much as digits as its factorization.

1664124542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832062273.

The product of its digits is 46080, while the sum is 35.

The square root of 1664124542 is about 40793.6826236612. The cubic root of 1664124542 is about 1185.0279903422.

The spelling of 1664124542 in words is "one billion, six hundred sixty-four million, one hundred twenty-four thousand, five hundred forty-two".