6505551550 has 24 divisors (see below), whose sum is σ = 12737187000. Its totient is φ = 2465261280.

The previous prime is 6505551523. The next prime is 6505551581. The reversal of 6505551550 is 551555056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3423025 + ... + 3424924.

It is an arithmetic number, because the mean of its divisors is an integer number (530716125).

Almost surely, 2^6505551550 is an apocalyptic number.

6505551550 is a deficient number, since it is larger than the sum of its proper divisors (6231635450).

6505551550 is a wasteful number, since it uses less digits than its factorization.

6505551550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6847980 (or 6847975 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 37.

The square root of 6505551550 is about 80656.9993862901. Note that the first 3 decimals coincide. The cubic root of 6505551550 is about 1866.7867406108.

The spelling of 6505551550 in words is "six billion, five hundred five million, five hundred fifty-one thousand, five hundred fifty".