2754917721 has 12 divisors (see below), whose sum is σ = 3988395840. Its totient is φ = 1832425560.

The previous prime is 2754917717. The next prime is 2754917729. The reversal of 2754917721 is 1277194572.

2754917721 is a `hidden beast` number, since 2 + 75 + 491 + 77 + 21 = 666.

It is not a de Polignac number, because 2754917721 - 2² = 2754917717 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2754917729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344685 + ... + 352586.

It is an arithmetic number, because the mean of its divisors is an integer number (332366320).

Almost surely, 2^2754917721 is an apocalyptic number.

It is an amenable number.

2754917721 is a deficient number, since it is larger than the sum of its proper divisors (1233478119).

2754917721 is a wasteful number, since it uses less digits than its factorization.

2754917721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697716 (or 697713 counting only the distinct ones).

The product of its digits is 246960, while the sum is 45.

The square root of 2754917721 is about 52487.3100949172. The cubic root of 2754917721 is about 1401.8542981723.

The spelling of 2754917721 in words is "two billion, seven hundred fifty-four million, nine hundred seventeen thousand, seven hundred twenty-one".