2723900772721 has 4 divisors (see below), whose sum is σ = 2723994403444. Its totient is φ = 2723807142000.

The previous prime is 2723900772707. The next prime is 2723900772731. The reversal of 2723900772721 is 1272770093272.

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 1096334643600 + 1627566129121 = 1047060^2 + 1275761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2723900772721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2723900772731) 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, 46771710 + ... + 46829911.

It is an arithmetic number, because the mean of its divisors is an integer number (680998600861).

Almost surely, 2^{2723900772721} is an apocalyptic number.

It is an amenable number.

2723900772721 is a deficient number, since it is larger than the sum of its proper divisors (93630723).

2723900772721 is an equidigital number, since it uses as much as digits as its factorization.

2723900772721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93630722.

The product of its (nonzero) digits is 1037232, while the sum is 49.

The spelling of 2723900772721 in words is "two trillion, seven hundred twenty-three billion, nine hundred million, seven hundred seventy-two thousand, seven hundred twenty-one".