2656295640 has 128 divisors (see below), whose sum is σ = 9004608000. Its totient is φ = 696322944.

The previous prime is 2656295639. The next prime is 2656295641. The reversal of 2656295640 is 465926562.

It is a happy number.

2656295640 is a `hidden beast` number, since 2 + 65 + 6 + 29 + 564 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2656295639) and next prime (2656295641).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656295641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42877 + ... + 84563.

It is an arithmetic number, because the mean of its divisors is an integer number (70348500).

Almost surely, 2^2656295640 is an apocalyptic number.

2656295640 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 2656295640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4502304000).

2656295640 is an abundant number, since it is smaller than the sum of its proper divisors (6348312360).

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

2656295640 is a wasteful number, since it uses less digits than its factorization.

2656295640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41766 (or 41756 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The square root of 2656295640 is about 51539.2630913559. The cubic root of 2656295640 is about 1384.9224960648.

The spelling of 2656295640 in words is "two billion, six hundred fifty-six million, two hundred ninety-five thousand, six hundred forty".