6505995136 has 32 divisors (see below), whose sum is σ = 13180858200. Its totient is φ = 3197858304.

The previous prime is 6505995131. The next prime is 6505995137. The reversal of 6505995136 is 6315995056.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 6505995136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6505995131) 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, 423195 + ... + 438298.

Almost surely, 2^6505995136 is an apocalyptic number.

It is an amenable number.

6505995136 is an abundant number, since it is smaller than the sum of its proper divisors (6674863064).

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

6505995136 is an equidigital number, since it uses as much as digits as its factorization.

6505995136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861566 (or 861554 counting only the distinct ones).

The product of its (nonzero) digits is 1093500, while the sum is 49.

The square root of 6505995136 is about 80659.7491689628. The cubic root of 6505995136 is about 1866.8291690729.

The spelling of 6505995136 in words is "six billion, five hundred five million, nine hundred ninety-five thousand, one hundred thirty-six".