2772064521 has 6 divisors (see below), whose sum is σ = 4004093210. Its totient is φ = 1848043008.

The previous prime is 2772064513. The next prime is 2772064567. The reversal of 2772064521 is 1254602772.

It is a happy number.

2772064521 is a `hidden beast` number, since 2 + 7 + 7 + 2 + 0 + 645 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2416214025 + 355850496 = 49155^2 + 18864^2 .

It is not a de Polignac number, because 2772064521 - 2³ = 2772064513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2772064621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154003576 + ... + 154003593.

Almost surely, 2^2772064521 is an apocalyptic number.

It is an amenable number.

2772064521 is a deficient number, since it is larger than the sum of its proper divisors (1232028689).

2772064521 is a wasteful number, since it uses less digits than its factorization.

2772064521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308007175 (or 308007172 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 2772064521 is about 52650.3990583167. The cubic root of 2772064521 is about 1404.7566978641.

The spelling of 2772064521 in words is "two billion, seven hundred seventy-two million, sixty-four thousand, five hundred twenty-one".