6446017637220 has 48 divisors (see below), whose sum is σ = 20627256440448. Its totient is φ = 1473375459840.

The previous prime is 6446017637219. The next prime is 6446017637233. The reversal of 6446017637220 is 227367106446.

It is a super-2 number, since 2×6446017637220² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6446017637220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7673830101 + ... + 7673830940.

It is an arithmetic number, because the mean of its divisors is an integer number (429734509176).

Almost surely, 2^{6446017637220} is an apocalyptic number.

6446017637220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6446017637220 is an abundant number, since it is smaller than the sum of its proper divisors (14181238803228).

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

6446017637220 is a wasteful number, since it uses less digits than its factorization.

6446017637220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15347661060 (or 15347661058 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 48.

The spelling of 6446017637220 in words is "six trillion, four hundred forty-six billion, seventeen million, six hundred thirty-seven thousand, two hundred twenty".