2699945521 has 27 divisors (see below), whose sum is σ = 3406900203. Its totient is φ = 2132479440.

The previous prime is 2699945513. The next prime is 2699945531. The reversal of 2699945521 is 1255499962.

The square root of 2699945521 is 51961.

It is a perfect power (a square), and thus also a powerful number.

2699945521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 399400225 + 2300545296 = 19985^2 + 47964^2 .

It is not a de Polignac number, because 2699945521 - 2³ = 2699945513 is a prime.

It is a super-2 number, since 2×2699945521² = 14579411632735922882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2699945531) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4728166 + ... + 4728736.

It is an arithmetic number, because the mean of its divisors is an integer number (126181489).

Almost surely, 2^2699945521 is an apocalyptic number.

2699945521 is the 51961-st square number.

2699945521 is the 25981-st centered octagonal number.

It is an amenable number.

2699945521 is a deficient number, since it is larger than the sum of its proper divisors (706954682).

2699945521 is an frugal number, since it uses more digits than its factorization.

2699945521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 591 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 52.

The cubic root of 2699945521 is about 1392.4672844980.

The spelling of 2699945521 in words is "two billion, six hundred ninety-nine million, nine hundred forty-five thousand, five hundred twenty-one".