17742772804 has 9 divisors (see below), whose sum is σ = 31050318621. Its totient is φ = 8871253200.

The previous prime is 17742772787. The next prime is 17742772811. The reversal of 17742772804 is 40827724771.

It is a happy number.

The square root of 17742772804 is 133202.

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., 14113915204 + 3628857600 = 118802^2 + 60240^2 .

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, 233104 + ... + 299704.

Almost surely, 2^17742772804 is an apocalyptic number.

17742772804 is the 133202-nd square number.

It is an amenable number.

17742772804 is a deficient number, since it is larger than the sum of its proper divisors (13307545817).

17742772804 is an frugal number, since it uses more digits than its factorization.

17742772804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133206 (or 66603 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 49.

Multiplying 17742772804 by its sum of digits (49), we get a square (869395867396 = 932414²).

The spelling of 17742772804 in words is "seventeen billion, seven hundred forty-two million, seven hundred seventy-two thousand, eight hundred four".