2639024857868 has 96 divisors (see below), whose sum is σ = 5518446796800. Its totient is φ = 1080788083200.

The previous prime is 2639024857811. The next prime is 2639024857919. The reversal of 2639024857868 is 8687584209362.

It is a junction number, because it is equal to n+sod(n) for n = 2639024857798 and 2639024857807.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16657853 + ... + 16815531.

It is an arithmetic number, because the mean of its divisors is an integer number (57483820800).

Almost surely, 2^{2639024857868} is an apocalyptic number.

2639024857868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2639024857868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2759223398400).

2639024857868 is an abundant number, since it is smaller than the sum of its proper divisors (2879421938932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2639024857868 is a wasteful number, since it uses less digits than its factorization.

2639024857868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158031 (or 158029 counting only the distinct ones).

The product of its (nonzero) digits is 278691840, while the sum is 68.

The spelling of 2639024857868 in words is "two trillion, six hundred thirty-nine billion, twenty-four million, eight hundred fifty-seven thousand, eight hundred sixty-eight".