205914750457 has 4 divisors (see below), whose sum is σ = 221754346660. Its totient is φ = 190075154256.

The previous prime is 205914750439. The next prime is 205914750479. The reversal of 205914750457 is 754057419502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 106978709776 + 98936040681 = 327076^2 + 314541^2 .

It is not a de Polignac number, because 205914750457 - 2⁷ = 205914750329 is a prime.

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 205914750457.

It is not an unprimeable number, because it can be changed into a prime (205914750557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7919798082 + ... + 7919798107.

It is an arithmetic number, because the mean of its divisors is an integer number (55438586665).

Almost surely, 2^205914750457 is an apocalyptic number.

It is an amenable number.

205914750457 is a deficient number, since it is larger than the sum of its proper divisors (15839596203).

205914750457 is a wasteful number, since it uses less digits than its factorization.

205914750457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15839596202.

The product of its (nonzero) digits is 1764000, while the sum is 49.

The spelling of 205914750457 in words is "two hundred five billion, nine hundred fourteen million, seven hundred fifty thousand, four hundred fifty-seven".