723336521042 has 4 divisors (see below), whose sum is σ = 1085004781566. Its totient is φ = 361668260520.

The previous prime is 723336521027. The next prime is 723336521051. The reversal of 723336521042 is 240125633327.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240125633327 = 54419 ⋅4412533.

It can be written as a sum of positive squares in only one way, i.e., 722756722801 + 579798241 = 850151^2 + 24079^2 .

It is a junction number, because it is equal to n+sod(n) for n = 723336520987 and 723336521005.

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 as a sum of consecutive naturals, namely, 180834130259 + ... + 180834130262.

Almost surely, 2^723336521042 is an apocalyptic number.

723336521042 is a deficient number, since it is larger than the sum of its proper divisors (361668260524).

723336521042 is a wasteful number, since it uses less digits than its factorization.

723336521042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361668260523.

The product of its (nonzero) digits is 181440, while the sum is 38.

The spelling of 723336521042 in words is "seven hundred twenty-three billion, three hundred thirty-six million, five hundred twenty-one thousand, forty-two".