205053415625 has 24 divisors (see below), whose sum is σ = 271376927640. Its totient is φ = 154393120000.

The previous prime is 205053415613. The next prime is 205053415643. The reversal of 205053415625 is 526514350502.

It can be written as a sum of positive squares in 12 ways, for example, as 204909223561 + 144192064 = 452669^2 + 12008^2 .

It is not a de Polignac number, because 205053415625 - 2²⁰ = 205052367049 is a prime.

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, 1876790 + ... + 1983039.

It is an arithmetic number, because the mean of its divisors is an integer number (11307371985).

Almost surely, 2^205053415625 is an apocalyptic number.

205053415625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

205053415625 is a deficient number, since it is larger than the sum of its proper divisors (66323512015).

205053415625 is an frugal number, since it uses more digits than its factorization.

205053415625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3859871 (or 3859851 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 205053415625 in words is "two hundred five billion, fifty-three million, four hundred fifteen thousand, six hundred twenty-five".