721468221429 has 8 divisors (see below), whose sum is σ = 961975262752. Its totient is φ = 480969997200.

The previous prime is 721468221343. The next prime is 721468221491. The reversal of 721468221429 is 924122864127.

It is a happy number.

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

It is not a de Polignac number, because 721468221429 - 2²⁴ = 721451444213 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 (721468221629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2010922 + ... + 2342379.

It is an arithmetic number, because the mean of its divisors is an integer number (120246907844).

Almost surely, 2^721468221429 is an apocalyptic number.

It is an amenable number.

721468221429 is a deficient number, since it is larger than the sum of its proper divisors (240507041323).

721468221429 is a wasteful number, since it uses less digits than its factorization.

721468221429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4408547.

The product of its digits is 774144, while the sum is 48.

The spelling of 721468221429 in words is "seven hundred twenty-one billion, four hundred sixty-eight million, two hundred twenty-one thousand, four hundred twenty-nine".