6501440838442 has 32 divisors (see below), whose sum is σ = 10690190115264. Its totient is φ = 2940906259200.

The previous prime is 6501440838427. The next prime is 6501440838449. The reversal of 6501440838442 is 2448380441056.

It is a super-4 number, since 4×6501440838442⁴ (a number of 52 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (6501440838449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51430578 + ... + 51556834.

It is an arithmetic number, because the mean of its divisors is an integer number (334068441102).

Almost surely, 2^{6501440838442} is an apocalyptic number.

6501440838442 is a deficient number, since it is larger than the sum of its proper divisors (4188749276822).

6501440838442 is a wasteful number, since it uses less digits than its factorization.

6501440838442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137574.

The product of its (nonzero) digits is 2949120, while the sum is 49.

The spelling of 6501440838442 in words is "six trillion, five hundred one billion, four hundred forty million, eight hundred thirty-eight thousand, four hundred forty-two".