2750370721 has 16 divisors (see below), whose sum is σ = 3330878976. Its totient is φ = 2216987136.

The previous prime is 2750370713. The next prime is 2750370737. The reversal of 2750370721 is 1270730572.

It is a happy number.

It is not a de Polignac number, because 2750370721 - 2³ = 2750370713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2750370221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149205 + ... + 166621.

It is an arithmetic number, because the mean of its divisors is an integer number (208179936).

Almost surely, 2^2750370721 is an apocalyptic number.

It is an amenable number.

2750370721 is a deficient number, since it is larger than the sum of its proper divisors (580508255).

2750370721 is a wasteful number, since it uses less digits than its factorization.

2750370721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18768.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 2750370721 is about 52443.9769754354. The cubic root of 2750370721 is about 1401.0826185488.

The spelling of 2750370721 in words is "two billion, seven hundred fifty million, three hundred seventy thousand, seven hundred twenty-one".