721973446479 has 8 divisors (see below), whose sum is σ = 1069590291120. Its totient is φ = 481315630968.

The previous prime is 721973446459. The next prime is 721973446489. The reversal of 721973446479 is 974644379127.

721973446479 is a `hidden beast` number, since 7 + 2 + 1 + 97 + 34 + 46 + 479 = 666.

It is not a de Polignac number, because 721973446479 - 2⁸ = 721973446223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721973446459) by changing a digit.

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, 13369878612 + ... + 13369878665.

It is an arithmetic number, because the mean of its divisors is an integer number (133698786390).

Almost surely, 2^721973446479 is an apocalyptic number.

721973446479 is a deficient number, since it is larger than the sum of its proper divisors (347616844641).

721973446479 is a wasteful number, since it uses less digits than its factorization.

721973446479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26739757286 (or 26739757280 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 63.

The spelling of 721973446479 in words is "seven hundred twenty-one billion, nine hundred seventy-three million, four hundred forty-six thousand, four hundred seventy-nine".