2638841309479 has 8 divisors (see below), whose sum is σ = 2724293242880. Its totient is φ = 2553409877400.

The previous prime is 2638841309449. The next prime is 2638841309483. The reversal of 2638841309479 is 9749031488362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2638841309479 - 2¹³ = 2638841301287 is a prime.

It is a super-2 number, since 2×2638841309479² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2638841309479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638841309449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4863519 + ... + 5378800.

It is an arithmetic number, because the mean of its divisors is an integer number (340536655360).

Almost surely, 2^{2638841309479} is an apocalyptic number.

2638841309479 is a deficient number, since it is larger than the sum of its proper divisors (85451933401).

2638841309479 is a wasteful number, since it uses less digits than its factorization.

2638841309479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250661.

The product of its (nonzero) digits is 62705664, while the sum is 64.

The spelling of 2638841309479 in words is "two trillion, six hundred thirty-eight billion, eight hundred forty-one million, three hundred nine thousand, four hundred seventy-nine".