205245427399 has 8 divisors (see below), whose sum is σ = 212472106560. Its totient is φ = 198028698336.

The previous prime is 205245427367. The next prime is 205245427427. The reversal of 205245427399 is 993724542502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 205245427399 - 2⁵ = 205245427367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205245427319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2445532 + ... + 2528065.

It is an arithmetic number, because the mean of its divisors is an integer number (26559013320).

Almost surely, 2^205245427399 is an apocalyptic number.

205245427399 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

205245427399 is a deficient number, since it is larger than the sum of its proper divisors (7226679161).

205245427399 is a wasteful number, since it uses less digits than its factorization.

205245427399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4975049.

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 205245427399 in words is "two hundred five billion, two hundred forty-five million, four hundred twenty-seven thousand, three hundred ninety-nine".