2638969578313 has 4 divisors (see below), whose sum is σ = 2640693269968. Its totient is φ = 2637245886660.

The previous prime is 2638969578299. The next prime is 2638969578359. The reversal of 2638969578313 is 3138759698362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2638969578313 is a prime.

It is a super-2 number, since 2×2638969578313² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2638969578373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 861843531 + ... + 861846592.

It is an arithmetic number, because the mean of its divisors is an integer number (660173317492).

Almost surely, 2^{2638969578313} is an apocalyptic number.

It is an amenable number.

2638969578313 is a deficient number, since it is larger than the sum of its proper divisors (1723691655).

2638969578313 is a wasteful number, since it uses less digits than its factorization.

2638969578313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723691654.

The product of its digits is 352719360, while the sum is 70.

The spelling of 2638969578313 in words is "two trillion, six hundred thirty-eight billion, nine hundred sixty-nine million, five hundred seventy-eight thousand, three hundred thirteen".