2737116721 has 4 divisors (see below), whose sum is σ = 2741582452. Its totient is φ = 2732650992.

The previous prime is 2737116709. The next prime is 2737116727. The reversal of 2737116721 is 1276117372.

It is a happy number.

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 359481600 + 2377635121 = 18960^2 + 48761^2 .

It is a cyclic number.

It is not a de Polignac number, because 2737116721 - 2⁵ = 2737116689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2737116727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231946 + ... + 2233171.

It is an arithmetic number, because the mean of its divisors is an integer number (685395613).

Almost surely, 2^2737116721 is an apocalyptic number.

It is an amenable number.

2737116721 is a deficient number, since it is larger than the sum of its proper divisors (4465731).

2737116721 is an equidigital number, since it uses as much as digits as its factorization.

2737116721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4465730.

The product of its digits is 24696, while the sum is 37.

The square root of 2737116721 is about 52317.4609571221. The cubic root of 2737116721 is about 1398.8283941216.

The spelling of 2737116721 in words is "two billion, seven hundred thirty-seven million, one hundred sixteen thousand, seven hundred twenty-one".