1720146257273 has 8 divisors (see below), whose sum is σ = 1725805140360. Its totient is φ = 1714494038400.

The previous prime is 1720146257267. The next prime is 1720146257281. The reversal of 1720146257273 is 3727526410271.

It can be written as a sum of positive squares in 4 ways, for example, as 3710880889 + 1716435376384 = 60917^2 + 1310128^2 .

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 1720146257273 - 2¹⁴ = 1720146240889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720146257213) 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, 1148708 + ... + 2181701.

It is an arithmetic number, because the mean of its divisors is an integer number (215725642545).

Almost surely, 2^{1720146257273} is an apocalyptic number.

It is an amenable number.

1720146257273 is a deficient number, since it is larger than the sum of its proper divisors (5658883087).

1720146257273 is a wasteful number, since it uses less digits than its factorization.

1720146257273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332107.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 1720146257273 in words is "one trillion, seven hundred twenty billion, one hundred forty-six million, two hundred fifty-seven thousand, two hundred seventy-three".