205278796863 has 48 divisors (see below), whose sum is σ = 365013282816. Its totient is φ = 108582629760.

The previous prime is 205278796861. The next prime is 205278796871. The reversal of 205278796863 is 368697872502.

205278796863 is a `hidden beast` number, since 20 + 527 + 8 + 7 + 9 + 6 + 86 + 3 = 666.

It is not a de Polignac number, because 205278796863 - 2¹ = 205278796861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 205278796863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205278796861) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2240070 + ... + 2329907.

It is an arithmetic number, because the mean of its divisors is an integer number (7604443392).

Almost surely, 2^205278796863 is an apocalyptic number.

205278796863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

205278796863 is a deficient number, since it is larger than the sum of its proper divisors (159734485953).

205278796863 is a wasteful number, since it uses less digits than its factorization.

205278796863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570044 (or 4570041 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 205278796863 in words is "two hundred five billion, two hundred seventy-eight million, seven hundred ninety-six thousand, eight hundred sixty-three".