6518197973420 has 96 divisors (see below), whose sum is σ = 15713589534720. Its totient is φ = 2224828892160.

The previous prime is 6518197973387. The next prime is 6518197973423. The reversal of 6518197973420 is 243797918156.

It is not an unprimeable number, because it can be changed into a prime (6518197973423) 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, 111953957 + ... + 112012163.

It is an arithmetic number, because the mean of its divisors is an integer number (163683224320).

It is a 1-persistent number, because it is pandigital, but 2⋅6518197973420 = 13036395946840 is not.

Almost surely, 2^{6518197973420} 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 6518197973420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7856794767360).

6518197973420 is an abundant number, since it is smaller than the sum of its proper divisors (9195391561300).

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

6518197973420 is a wasteful number, since it uses less digits than its factorization.

6518197973420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61783 (or 61781 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 6518197973420 in words is "six trillion, five hundred eighteen billion, one hundred ninety-seven million, nine hundred seventy-three thousand, four hundred twenty".