10720182640561 has 3 divisors (see below), whose sum is σ = 10720185914731. Its totient is φ = 10720179366392.

The previous prime is 10720182640543. The next prime is 10720182640579. The reversal of 10720182640561 is 16504628102701.

The square root of 10720182640561 is 3274169.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (10720182640543) and next prime (10720182640579).

It can be written as a sum of positive squares in only one way, i.e., 3722464738161 + 6997717902400 = 1929369^2 + 2645320^2 .

It is not a de Polignac number, because 10720182640561 - 2⁵ = 10720182640529 is a prime.

It is a super-2 number, since 2×10720182640561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10720182640061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1637085 + ... + 4911253.

Almost surely, 2^{10720182640561} is an apocalyptic number.

10720182640561 is the 3274169-th square number.

10720182640561 is the 1637085-th centered octagonal number.

It is an amenable number.

10720182640561 is a deficient number, since it is larger than the sum of its proper divisors (3274170).

10720182640561 is an frugal number, since it uses more digits than its factorization.

10720182640561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6548338 (or 3274169 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The spelling of 10720182640561 in words is "ten trillion, seven hundred twenty billion, one hundred eighty-two million, six hundred forty thousand, five hundred sixty-one".