133723209728 has 30 divisors (see below), whose sum is σ = 267438290406. Its totient is φ = 66861596672.

The previous prime is 133723209709. The next prime is 133723209811. The reversal of 133723209728 is 827902327331.

It can be written as a sum of positive squares in only one way, i.e., 86596009984 + 47127199744 = 294272^2 + 217088^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4064525 + ... + 4097292.

Almost surely, 2^133723209728 is an apocalyptic number.

It is an amenable number.

133723209728 is a deficient number, since it is larger than the sum of its proper divisors (133715080678).

133723209728 is an frugal number, since it uses more digits than its factorization.

133723209728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8161845 (or 8161819 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 133723209728 in words is "one hundred thirty-three billion, seven hundred twenty-three million, two hundred nine thousand, seven hundred twenty-eight".