2771223664 has 40 divisors (see below), whose sum is σ = 5937624432. Its totient is φ = 1242385920.

The previous prime is 2771223647. The next prime is 2771223683. The reversal of 2771223664 is 4663221772.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94999 + ... + 120694.

Almost surely, 2^2771223664 is an apocalyptic number.

It is an amenable number.

2771223664 is an abundant number, since it is smaller than the sum of its proper divisors (3166400768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2771223664 is a wasteful number, since it uses less digits than its factorization.

2771223664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215785 (or 215779 counting only the distinct ones).

The product of its digits is 169344, while the sum is 40.

The square root of 2771223664 is about 52642.4131665713. The cubic root of 2771223664 is about 1404.6146474241.

The spelling of 2771223664 in words is "two billion, seven hundred seventy-one million, two hundred twenty-three thousand, six hundred sixty-four".