723798644049 has 128 divisors (see below), whose sum is σ = 1222184678400. Its totient is φ = 425238460416.

The previous prime is 723798644047. The next prime is 723798644071. The reversal of 723798644049 is 940446897327.

723798644049 is a `hidden beast` number, since 7 + 2 + 3 + 79 + 86 + 440 + 49 = 666.

It is not a de Polignac number, because 723798644049 - 2¹ = 723798644047 is a prime.

It is a super-2 number, since 2×723798644049² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (723798644047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 659797669 + ... + 659798765.

It is an arithmetic number, because the mean of its divisors is an integer number (9548317800).

Almost surely, 2^723798644049 is an apocalyptic number.

It is an amenable number.

723798644049 is a deficient number, since it is larger than the sum of its proper divisors (498386034351).

723798644049 is a wasteful number, since it uses less digits than its factorization.

723798644049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 723798644049 in words is "seven hundred twenty-three billion, seven hundred ninety-eight million, six hundred forty-four thousand, forty-nine".