2720632613 has 4 divisors (see below), whose sum is σ = 2786989548. Its totient is φ = 2654275680.

The previous prime is 2720632601. The next prime is 2720632631. The reversal of 2720632613 is 3162360272.

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

It can be written as a sum of positive squares in 2 ways, for example, as 783048289 + 1937584324 = 27983^2 + 44018^2 .

It is a cyclic number.

It is not a de Polignac number, because 2720632613 - 2⁶ = 2720632549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2720632613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720632813) 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, 33178406 + ... + 33178487.

It is an arithmetic number, because the mean of its divisors is an integer number (696747387).

Almost surely, 2^2720632613 is an apocalyptic number.

It is an amenable number.

2720632613 is a deficient number, since it is larger than the sum of its proper divisors (66356935).

2720632613 is an equidigital number, since it uses as much as digits as its factorization.

2720632613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66356934.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 2720632613 is about 52159.6837893023. The cubic root of 2720632613 is about 1396.0146201770.

Adding to 2720632613 its reverse (3162360272), we get a palindrome (5882992885).

The spelling of 2720632613 in words is "two billion, seven hundred twenty million, six hundred thirty-two thousand, six hundred thirteen".