1601664892 has 12 divisors (see below), whose sum is σ = 2924779536. Its totient is φ = 766013600.

The previous prime is 1601664887. The next prime is 1601664893. The reversal of 1601664892 is 2984661061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601664893) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8704609 + ... + 8704792.

It is an arithmetic number, because the mean of its divisors is an integer number (243731628).

Almost surely, 2^1601664892 is an apocalyptic number.

It is an amenable number.

1601664892 is a deficient number, since it is larger than the sum of its proper divisors (1323114644).

1601664892 is a wasteful number, since it uses less digits than its factorization.

1601664892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17409428 (or 17409426 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1601664892 is about 40020.8057390153. The cubic root of 1601664892 is about 1170.0126357999.

It can be divided in two parts, 16016 and 64892, that added together give a palindrome (80908).

The spelling of 1601664892 in words is "one billion, six hundred one million, six hundred sixty-four thousand, eight hundred ninety-two".