205075947085 has 16 divisors (see below), whose sum is σ = 260729404416. Its totient is φ = 154313936128.

The previous prime is 205075947079. The next prime is 205075947101. The reversal of 205075947085 is 580749570502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 205075947085 - 2¹⁵ = 205075914317 is a prime.

It is a super-2 number, since 2×205075947085² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614077 + ... + 887266.

It is an arithmetic number, because the mean of its divisors is an integer number (16295587776).

Almost surely, 2^205075947085 is an apocalyptic number.

It is an amenable number.

205075947085 is a deficient number, since it is larger than the sum of its proper divisors (55653457331).

205075947085 is a wasteful number, since it uses less digits than its factorization.

205075947085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502972.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 205075947085 in words is "two hundred five billion, seventy-five million, nine hundred forty-seven thousand, eighty-five".