6553636640 has 48 divisors (see below), whose sum is σ = 15494213952. Its totient is φ = 2619550464.

The previous prime is 6553636637. The next prime is 6553636669. The reversal of 6553636640 is 466363556.

It is a junction number, because it is equal to n+sod(n) for n = 6553636591 and 6553636600.

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, 217367 + ... + 245673.

It is an arithmetic number, because the mean of its divisors is an integer number (322796124).

Almost surely, 2^6553636640 is an apocalyptic number.

It is an amenable number.

6553636640 is an abundant number, since it is smaller than the sum of its proper divisors (8940577312).

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

6553636640 is a wasteful number, since it uses less digits than its factorization.

6553636640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29769 (or 29761 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 44.

The square root of 6553636640 is about 80954.5344004893. The cubic root of 6553636640 is about 1871.3748399501.

The spelling of 6553636640 in words is "six billion, five hundred fifty-three million, six hundred thirty-six thousand, six hundred forty".