2720161761 has 8 divisors (see below), whose sum is σ = 3629394624. Its totient is φ = 1812185040.

The previous prime is 2720161709. The next prime is 2720161781. The reversal of 2720161761 is 1671610272.

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

It is not a de Polignac number, because 2720161761 - 2¹¹ = 2720159713 is a prime.

It is a super-2 number, since 2×2720161761² = 14798560012013242242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2720161781) 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, 308970 + ... + 317651.

It is an arithmetic number, because the mean of its divisors is an integer number (453674328).

Almost surely, 2^2720161761 is an apocalyptic number.

It is an amenable number.

2720161761 is a deficient number, since it is larger than the sum of its proper divisors (909232863).

2720161761 is a wasteful number, since it uses less digits than its factorization.

2720161761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628071.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 2720161761 is about 52155.1700313593. The cubic root of 2720161761 is about 1395.9340807961.

The spelling of 2720161761 in words is "two billion, seven hundred twenty million, one hundred sixty-one thousand, seven hundred sixty-one".