1720609074021 has 8 divisors (see below), whose sum is σ = 2294151922144. Its totient is φ = 1147069470960.

The previous prime is 1720609074013. The next prime is 1720609074031. The reversal of 1720609074021 is 1204709060271.

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

It is not a de Polignac number, because 1720609074021 - 2³ = 1720609074013 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 (1720609074011) 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, 1010070 + ... + 2112216.

It is an arithmetic number, because the mean of its divisors is an integer number (286768990268).

Almost surely, 2^{1720609074021} is an apocalyptic number.

It is an amenable number.

1720609074021 is a deficient number, since it is larger than the sum of its proper divisors (573542848123).

1720609074021 is a wasteful number, since it uses less digits than its factorization.

1720609074021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622531.

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 1720609074021 in words is "one trillion, seven hundred twenty billion, six hundred nine million, seventy-four thousand, twenty-one".