6509998512 has 150 divisors (see below), whose sum is σ = 19472956404. Its totient is φ = 2099597760.

The previous prime is 6509998501. The next prime is 6509998589. The reversal of 6509998512 is 2158999056.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1242843 + ... + 1248069.

Almost surely, 2^6509998512 is an apocalyptic number.

6509998512 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6509998512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9736478202).

6509998512 is an abundant number, since it is smaller than the sum of its proper divisors (12962957892).

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

6509998512 is a wasteful number, since it uses less digits than its factorization.

6509998512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5309 (or 5263 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The square root of 6509998512 is about 80684.5617946829. The cubic root of 6509998512 is about 1867.2119999097.

The spelling of 6509998512 in words is "six billion, five hundred nine million, nine hundred ninety-eight thousand, five hundred twelve".