6495699965664 has 192 divisors, whose sum is σ = 20994431883264. Its totient is φ = 1712472109056.

The previous prime is 6495699965641. The next prime is 6495699965669. The reversal of 6495699965664 is 4665699965946.

It is a Harshad number since it is a multiple of its sum of digits (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6495699965669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22069452 + ... + 22361844.

It is an arithmetic number, because the mean of its divisors is an integer number (109345999392).

Almost surely, 2^{6495699965664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6495699965664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10497215941632).

6495699965664 is an abundant number, since it is smaller than the sum of its proper divisors (14498731917600).

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

6495699965664 is a wasteful number, since it uses less digits than its factorization.

6495699965664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294969 (or 294961 counting only the distinct ones).

The product of its digits is 20407334400, while the sum is 84.

The spelling of 6495699965664 in words is "six trillion, four hundred ninety-five billion, six hundred ninety-nine million, nine hundred sixty-five thousand, six hundred sixty-four".