723639499072 has 28 divisors (see below), whose sum is σ = 1641111007840. Its totient is φ = 310131213696.

The previous prime is 723639499031. The next prime is 723639499127. The reversal of 723639499072 is 270994936327.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×723639499072² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 723639499072.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 807632922 + ... + 807633817.

Almost surely, 2^723639499072 is an apocalyptic number.

It is an amenable number.

723639499072 is an abundant number, since it is smaller than the sum of its proper divisors (917471508768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

723639499072 is a wasteful number, since it uses less digits than its factorization.

723639499072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615266758 (or 1615266748 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 61.

The spelling of 723639499072 in words is "seven hundred twenty-three billion, six hundred thirty-nine million, four hundred ninety-nine thousand, seventy-two".