2638786878362 has 16 divisors (see below), whose sum is σ = 4094934980040. Its totient is φ = 1273814455872.

The previous prime is 2638786878359. The next prime is 2638786878379.

2638786878362 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 1817807724121 + 820979154241 = 1348261^2 + 906079^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2638786878362.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569693 + ... + 2366880.

Almost surely, 2^{2638786878362} is an apocalyptic number.

2638786878362 is a deficient number, since it is larger than the sum of its proper divisors (1456148101678).

2638786878362 is a wasteful number, since it uses less digits than its factorization.

2638786878362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2952097.

The product of its digits is 1560674304, while the sum is 74.

The spelling of 2638786878362 in words is "two trillion, six hundred thirty-eight billion, seven hundred eighty-six million, eight hundred seventy-eight thousand, three hundred sixty-two".