6438504644105 has 16 divisors (see below), whose sum is σ = 7793055266304. Its totient is φ = 5106428939520.

The previous prime is 6438504644087. The next prime is 6438504644137. The reversal of 6438504644105 is 5014464058346.

It is not a de Polignac number, because 6438504644105 - 2⁴² = 2040458133001 is a prime.

It is a super-2 number, since 2×6438504644105² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

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, 11711459 + ... + 12248888.

It is an arithmetic number, because the mean of its divisors is an integer number (487065954144).

Almost surely, 2^{6438504644105} is an apocalyptic number.

It is an amenable number.

6438504644105 is a deficient number, since it is larger than the sum of its proper divisors (1354550622199).

6438504644105 is a wasteful number, since it uses less digits than its factorization.

6438504644105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23960816.

The product of its (nonzero) digits is 5529600, while the sum is 50.

The spelling of 6438504644105 in words is "six trillion, four hundred thirty-eight billion, five hundred four million, six hundred forty-four thousand, one hundred five".