6495691540800 has 1344 divisors, whose sum is σ = 29041226956800. Its totient is φ = 1229340672000.

The previous prime is 6495691540763. The next prime is 6495691540801. The reversal of 6495691540800 is 80451965946.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6495691540801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 194762526 + ... + 194795874.

Almost surely, 2^{6495691540800} is an apocalyptic number.

6495691540800 is a gapful number since it is divisible by the number (60) 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 6495691540800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14520613478400).

6495691540800 is an abundant number, since it is smaller than the sum of its proper divisors (22545535416000).

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

6495691540800 is a wasteful number, since it uses less digits than its factorization.

6495691540800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33440 (or 33425 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 57.

The spelling of 6495691540800 in words is "six trillion, four hundred ninety-five billion, six hundred ninety-one million, five hundred forty thousand, eight hundred".