723245165690 has 16 divisors (see below), whose sum is σ = 1301850998280. Its totient is φ = 289295910720.

The previous prime is 723245165689. The next prime is 723245165711. The reversal of 723245165690 is 96561542327.

It can be written as a sum of positive squares in 4 ways, for example, as 418838069329 + 304407096361 = 647177^2 + 551731^2 .

It is a super-2 number, since 2×723245165690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2385260 + ... + 2671320.

Almost surely, 2^723245165690 is an apocalyptic number.

723245165690 is a deficient number, since it is larger than the sum of its proper divisors (578605832590).

723245165690 is a wasteful number, since it uses less digits than its factorization.

723245165690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538897.

The product of its (nonzero) digits is 2721600, while the sum is 50.

The spelling of 723245165690 in words is "seven hundred twenty-three billion, two hundred forty-five million, one hundred sixty-five thousand, six hundred ninety".