721071405479 has 8 divisors (see below), whose sum is σ = 769920531072. Its totient is φ = 673680462840.

The previous prime is 721071405469. The next prime is 721071405487. The reversal of 721071405479 is 974504170127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721071405479 - 2⁴ = 721071405463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721071405469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364544717 + ... + 364546694.

It is an arithmetic number, because the mean of its divisors is an integer number (96240066384).

Almost surely, 2^721071405479 is an apocalyptic number.

721071405479 is a deficient number, since it is larger than the sum of its proper divisors (48849125593).

721071405479 is a wasteful number, since it uses less digits than its factorization.

721071405479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729091477.

The product of its (nonzero) digits is 493920, while the sum is 47.

The spelling of 721071405479 in words is "seven hundred twenty-one billion, seventy-one million, four hundred five thousand, four hundred seventy-nine".