2775287664 has 40 divisors (see below), whose sum is σ = 7966104720. Its totient is φ = 925095744.

The previous prime is 2775287629. The next prime is 2775287681. The reversal of 2775287664 is 4667825772.

2775287664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2775287664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3211707 + ... + 3212570.

It is an arithmetic number, because the mean of its divisors is an integer number (199152618).

Almost surely, 2^2775287664 is an apocalyptic number.

2775287664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2775287664 is an abundant number, since it is smaller than the sum of its proper divisors (5190817056).

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

2775287664 is a wasteful number, since it uses less digits than its factorization.

2775287664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6424294 (or 6424282 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The square root of 2775287664 is about 52680.9990793645. Note that the first 3 decimals coincide. The cubic root of 2775287664 is about 1405.3009345973.

The spelling of 2775287664 in words is "two billion, seven hundred seventy-five million, two hundred eighty-seven thousand, six hundred sixty-four".