2655277640 has 32 divisors (see below), whose sum is σ = 5989309560. Its totient is φ = 1059456000.

The previous prime is 2655277637. The next prime is 2655277679. The reversal of 2655277640 is 467725562.

It can be written as a sum of positive squares in 4 ways, for example, as 2271666244 + 383611396 = 47662^2 + 19586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2655277591 and 2655277600.

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, 66731 + ... + 98810.

Almost surely, 2^2655277640 is an apocalyptic number.

2655277640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2655277640 is an abundant number, since it is smaller than the sum of its proper divisors (3334031920).

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

2655277640 is a wasteful number, since it uses less digits than its factorization.

2655277640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165953 (or 165949 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 44.

The square root of 2655277640 is about 51529.3861791502. The cubic root of 2655277640 is about 1384.7455540079.

The spelling of 2655277640 in words is "two billion, six hundred fifty-five million, two hundred seventy-seven thousand, six hundred forty".