205255203413645 has 16 divisors (see below), whose sum is σ = 307083109523328. Its totient is φ = 127951295634240.

The previous prime is 205255203413641. The next prime is 205255203413671. The reversal of 205255203413645 is 546314302552502.

It is not a de Polignac number, because 205255203413645 - 2² = 205255203413641 is a prime.

It is a super-3 number, since 3×205255203413645³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205255203413645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205255203413641) 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, 266565198854 + ... + 266565199623.

It is an arithmetic number, because the mean of its divisors is an integer number (19192694345208).

Almost surely, 2^{205255203413645} is an apocalyptic number.

It is an amenable number.

205255203413645 is a deficient number, since it is larger than the sum of its proper divisors (101827906109683).

205255203413645 is a wasteful number, since it uses less digits than its factorization.

205255203413645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533130398500.

The product of its (nonzero) digits is 4320000, while the sum is 47.

The spelling of 205255203413645 in words is "two hundred five trillion, two hundred fifty-five billion, two hundred three million, four hundred thirteen thousand, six hundred forty-five".