723981213668 has 12 divisors (see below), whose sum is σ = 1271896958892. Its totient is φ = 360582082560.

The previous prime is 723981213629. The next prime is 723981213727. The reversal of 723981213668 is 866312189327.

It can be written as a sum of positive squares in 2 ways, for example, as 694852282084 + 29128931584 = 833578^2 + 170672^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352129913 + ... + 352131968.

It is an arithmetic number, because the mean of its divisors is an integer number (105991413241).

Almost surely, 2^723981213668 is an apocalyptic number.

It is an amenable number.

723981213668 is a deficient number, since it is larger than the sum of its proper divisors (547915745224).

723981213668 is a wasteful number, since it uses less digits than its factorization.

723981213668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704262142 (or 704262140 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The spelling of 723981213668 in words is "seven hundred twenty-three billion, nine hundred eighty-one million, two hundred thirteen thousand, six hundred sixty-eight".