1608091391572 has 6 divisors (see below), whose sum is σ = 2814159935258. Its totient is φ = 804045695784.

The previous prime is 1608091391561. The next prime is 1608091391591. The reversal of 1608091391572 is 2751931908061.

It can be written as a sum of positive squares in only one way, i.e., 1527409261456 + 80682130116 = 1235884^2 + 284046^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 201011423943 + ... + 201011423950.

Almost surely, 2^{1608091391572} is an apocalyptic number.

It is an amenable number.

1608091391572 is a deficient number, since it is larger than the sum of its proper divisors (1206068543686).

1608091391572 is a wasteful number, since it uses less digits than its factorization.

1608091391572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402022847897 (or 402022847895 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The spelling of 1608091391572 in words is "one trillion, six hundred eight billion, ninety-one million, three hundred ninety-one thousand, five hundred seventy-two".