205138776837372 has 48 divisors (see below), whose sum is σ = 547037458152192. Its totient is φ = 58611001962240.

The previous prime is 205138776837329. The next prime is 205138776837373. The reversal of 205138776837372 is 273738677831502.

It is a super-2 number, since 2×205138776837372² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205138776837297 and 205138776837306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205138776837373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102541908 + ... + 104523300.

It is an arithmetic number, because the mean of its divisors is an integer number (11396613711504).

Almost surely, 2^{205138776837372} is an apocalyptic number.

It is an amenable number.

205138776837372 is an abundant number, since it is smaller than the sum of its proper divisors (341898681314820).

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

205138776837372 is a wasteful number, since it uses less digits than its factorization.

205138776837372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213938 (or 3213936 counting only the distinct ones).

The product of its (nonzero) digits is 497871360, while the sum is 69.

The spelling of 205138776837372 in words is "two hundred five trillion, one hundred thirty-eight billion, seven hundred seventy-six million, eight hundred thirty-seven thousand, three hundred seventy-two".