2721716261 has 32 divisors (see below), whose sum is σ = 3120353280. Its totient is φ = 2352168000.

The previous prime is 2721716251. The next prime is 2721716341. The reversal of 2721716261 is 1626171272.

It is a cyclic number.

It is not a de Polignac number, because 2721716261 - 2¹⁸ = 2721454117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2721716251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3785060 + ... + 3785778.

It is an arithmetic number, because the mean of its divisors is an integer number (97511040).

Almost surely, 2^2721716261 is an apocalyptic number.

It is an amenable number.

2721716261 is a deficient number, since it is larger than the sum of its proper divisors (398637019).

2721716261 is a wasteful number, since it uses less digits than its factorization.

2721716261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its digits is 14112, while the sum is 35.

The square root of 2721716261 is about 52170.0705481601. The cubic root of 2721716261 is about 1396.1999432078.

The spelling of 2721716261 in words is "two billion, seven hundred twenty-one million, seven hundred sixteen thousand, two hundred sixty-one".