2749545521 has 4 divisors (see below), whose sum is σ = 2761552500. Its totient is φ = 2737538544.

The previous prime is 2749545457. The next prime is 2749545529. The reversal of 2749545521 is 1255459472.

2749545521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2088490000 + 661055521 = 45700^2 + 25711^2 .

It is a cyclic number.

It is not a de Polignac number, because 2749545521 - 2⁶ = 2749545457 is a prime.

It is a super-2 number, since 2×2749545521² = 15120001144102322882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2749545529) 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, 6003146 + ... + 6003603.

It is an arithmetic number, because the mean of its divisors is an integer number (690388125).

Almost surely, 2^2749545521 is an apocalyptic number.

It is an amenable number.

2749545521 is a deficient number, since it is larger than the sum of its proper divisors (12006979).

2749545521 is a wasteful number, since it uses less digits than its factorization.

2749545521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12006978.

The product of its digits is 504000, while the sum is 44.

The square root of 2749545521 is about 52436.1089422165. The cubic root of 2749545521 is about 1400.9424811948.

The spelling of 2749545521 in words is "two billion, seven hundred forty-nine million, five hundred forty-five thousand, five hundred twenty-one".