6542215680 has 1280 divisors, whose sum is σ = 30094073856. Its totient is φ = 1167851520.

The previous prime is 6542215661. The next prime is 6542215697. The reversal of 6542215680 is 865122456.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 176816622 + ... + 176816658.

Almost surely, 2^6542215680 is an apocalyptic number.

6542215680 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 6542215680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15047036928).

6542215680 is an abundant number, since it is smaller than the sum of its proper divisors (23551858176).

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

6542215680 is a wasteful number, since it uses less digits than its factorization.

6542215680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 6542215680 is about 80883.9642945374. The cubic root of 6542215680 is about 1870.2871321704.

It can be divided in two parts, 6542 and 215680, that added together give a palindrome (222222).

The spelling of 6542215680 in words is "six billion, five hundred forty-two million, two hundred fifteen thousand, six hundred eighty".