205138776837436 has 12 divisors (see below), whose sum is σ = 386607694809112. Its totient is φ = 94679435463408.

The previous prime is 205138776837391. The next prime is 205138776837443. The reversal of 205138776837436 is 634738677831502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972488238770 + ... + 1972488238873.

Almost surely, 2^{205138776837436} is an apocalyptic number.

205138776837436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

205138776837436 is a deficient number, since it is larger than the sum of its proper divisors (181468917971676).

205138776837436 is a wasteful number, since it uses less digits than its factorization.

205138776837436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944976477660 (or 3944976477658 counting only the distinct ones).

The product of its (nonzero) digits is 853493760, while the sum is 70.

The spelling of 205138776837436 in words is "two hundred five trillion, one hundred thirty-eight billion, seven hundred seventy-six million, eight hundred thirty-seven thousand, four hundred thirty-six".