1720052611 has 4 divisors (see below), whose sum is σ = 1779364800. Its totient is φ = 1660740424.

The previous prime is 1720052599. The next prime is 1720052681. The reversal of 1720052611 is 1162500271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1720052611 - 2¹⁵ = 1720019843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1720052681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29656051 + ... + 29656108.

It is an arithmetic number, because the mean of its divisors is an integer number (444841200).

Almost surely, 2^1720052611 is an apocalyptic number.

1720052611 is a deficient number, since it is larger than the sum of its proper divisors (59312189).

1720052611 is an equidigital number, since it uses as much as digits as its factorization.

1720052611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59312188.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 1720052611 is about 41473.5169837331. The cubic root of 1720052611 is about 1198.1574990602.

Adding to 1720052611 its reverse (1162500271), we get a palindrome (2882552882).

The spelling of 1720052611 in words is "one billion, seven hundred twenty million, fifty-two thousand, six hundred eleven".