2078105821863 has 32 divisors (see below), whose sum is σ = 2876061253632. Its totient is φ = 1333277560800.

The previous prime is 2078105821787. The next prime is 2078105821907. The reversal of 2078105821863 is 3681285018702.

It is a de Polignac number, because none of the positive numbers 2^k-2078105821863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2078105821063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62988870 + ... + 63021852.

It is an arithmetic number, because the mean of its divisors is an integer number (89876914176).

Almost surely, 2^{2078105821863} is an apocalyptic number.

2078105821863 is a deficient number, since it is larger than the sum of its proper divisors (797955431769).

2078105821863 is a wasteful number, since it uses less digits than its factorization.

2078105821863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36755.

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 2078105821863 in words is "two trillion, seventy-eight billion, one hundred five million, eight hundred twenty-one thousand, eight hundred sixty-three".