2655000640 has 56 divisors (see below), whose sum is σ = 6355125720. Its totient is φ = 1056473088.

The previous prime is 2655000599. The next prime is 2655000697. The reversal of 2655000640 is 460005562.

It can be written as a sum of positive squares in 4 ways, for example, as 73547776 + 2581452864 = 8576^2 + 50808^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2655000599 and 2655000608.

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, 40266 + ... + 83254.

Almost surely, 2^2655000640 is an apocalyptic number.

2655000640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2655000640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3177562860).

2655000640 is an abundant number, since it is smaller than the sum of its proper divisors (3700125080).

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

2655000640 is a wasteful number, since it uses less digits than its factorization.

2655000640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43199 (or 43189 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2655000640 is about 51526.6983223261. The cubic root of 2655000640 is about 1384.6973998649.

The spelling of 2655000640 in words is "two billion, six hundred fifty-five million, six hundred forty", and thus it is an aban number.