2656211540 has 12 divisors (see below), whose sum is σ = 5578044276. Its totient is φ = 1062484608.

The previous prime is 2656211539. The next prime is 2656211573. The reversal of 2656211540 is 451126562.

It can be written as a sum of positive squares in 2 ways, for example, as 501580816 + 2154630724 = 22396^2 + 46418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2656211497 and 2656211506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66405269 + ... + 66405308.

It is an arithmetic number, because the mean of its divisors is an integer number (464837023).

Almost surely, 2^2656211540 is an apocalyptic number.

2656211540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2656211540 is an abundant number, since it is smaller than the sum of its proper divisors (2921832736).

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

2656211540 is a wasteful number, since it uses less digits than its factorization.

2656211540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132810586 (or 132810584 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2656211540 is about 51538.4472020646. The cubic root of 2656211540 is about 1384.9078800699.

The spelling of 2656211540 in words is "two billion, six hundred fifty-six million, two hundred eleven thousand, five hundred forty".