1653723556 has 9 divisors (see below), whose sum is σ = 2894158561. Its totient is φ = 826821112.

The previous prime is 1653723527. The next prime is 1653723581. The reversal of 1653723556 is 6553273561.

It is a happy number.

The square root of 1653723556 is 40666.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1599200100 + 54523456 = 39990^2 + 7384^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71166 + ... + 91498.

Almost surely, 2^1653723556 is an apocalyptic number.

1653723556 is the 40666-th square number.

It is an amenable number.

1653723556 is a deficient number, since it is larger than the sum of its proper divisors (1240435005).

1653723556 is an frugal number, since it uses more digits than its factorization.

1653723556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40670 (or 20335 counting only the distinct ones).

The product of its digits is 567000, while the sum is 43.

The cubic root of 1653723556 is about 1182.5539712578.

The spelling of 1653723556 in words is "one billion, six hundred fifty-three million, seven hundred twenty-three thousand, five hundred fifty-six".