2646256140 has 72 divisors (see below), whose sum is σ = 8756708688. Its totient is φ = 641516160.

The previous prime is 2646256051. The next prime is 2646256147. The reversal of 2646256140 is 416526462.

2646256140 is a `hidden beast` number, since 2 + 6 + 462 + 56 + 140 = 666.

2646256140 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 2646256095 and 2646256104.

It is not an unprimeable number, because it can be changed into a prime (2646256147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666267 + ... + 670226.

It is an arithmetic number, because the mean of its divisors is an integer number (121620954).

Almost surely, 2^2646256140 is an apocalyptic number.

2646256140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2646256140 is an abundant number, since it is smaller than the sum of its proper divisors (6110452548).

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

2646256140 is a wasteful number, since it uses less digits than its factorization.

2646256140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336519 (or 1336514 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 2646256140 is about 51441.7742695564. The cubic root of 2646256140 is about 1383.1755164553.

The spelling of 2646256140 in words is "two billion, six hundred forty-six million, two hundred fifty-six thousand, one hundred forty".