2861339999868 has 72 divisors (see below), whose sum is σ = 8269059183840. Its totient is φ = 817232388480.

The previous prime is 2861339999849. The next prime is 2861339999879. The reversal of 2861339999868 is 8689999331682.

2861339999868 is a `hidden beast` number, since 2 + 8 + 61 + 3 + 399 + 99 + 86 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1332763 + ... + 2738418.

It is an arithmetic number, because the mean of its divisors is an integer number (114848044220).

Almost surely, 2^{2861339999868} is an apocalyptic number.

2861339999868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2861339999868 is an abundant number, since it is smaller than the sum of its proper divisors (5407719183972).

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

2861339999868 is a wasteful number, since it uses less digits than its factorization.

2861339999868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073987 (or 4073982 counting only the distinct ones).

The product of its digits is 2176782336, while the sum is 81.

The spelling of 2861339999868 in words is "two trillion, eight hundred sixty-one billion, three hundred thirty-nine million, nine hundred ninety-nine thousand, eight hundred sixty-eight".