2638765514564 has 6 divisors (see below), whose sum is σ = 4617839650494. Its totient is φ = 1319382757280.

The previous prime is 2638765514531. The next prime is 2638765514611. The reversal of 2638765514564 is 4654155678362.

2638765514564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2471680776964 + 167084737600 = 1572158^2 + 408760^2 .

It is a super-3 number, since 3×2638765514564³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2638765514497 and 2638765514506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329845689317 + ... + 329845689324.

It is an arithmetic number, because the mean of its divisors is an integer number (769639941749).

Almost surely, 2^{2638765514564} is an apocalyptic number.

It is an amenable number.

2638765514564 is a deficient number, since it is larger than the sum of its proper divisors (1979074135930).

2638765514564 is a wasteful number, since it uses less digits than its factorization.

2638765514564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659691378645 (or 659691378643 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 62.

The spelling of 2638765514564 in words is "two trillion, six hundred thirty-eight billion, seven hundred sixty-five million, five hundred fourteen thousand, five hundred sixty-four".