2682646640 has 20 divisors (see below), whose sum is σ = 6237153624. Its totient is φ = 1073058624.

The previous prime is 2682646609. The next prime is 2682646643. The reversal of 2682646640 is 466462862.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 2682646591 and 2682646600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2682646643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16766462 + ... + 16766621.

Almost surely, 2^2682646640 is an apocalyptic number.

2682646640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2682646640 is an abundant number, since it is smaller than the sum of its proper divisors (3554506984).

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

2682646640 is a wasteful number, since it uses less digits than its factorization.

2682646640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33533096 (or 33533090 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 44.

The square root of 2682646640 is about 51794.2722702038. The cubic root of 2682646640 is about 1389.4870077037.

The spelling of 2682646640 in words is "two billion, six hundred eighty-two million, six hundred forty-six thousand, six hundred forty".