205572507897 has 8 divisors (see below), whose sum is σ = 274103369344. Its totient is φ = 137044992528.

The previous prime is 205572507883. The next prime is 205572507937. The reversal of 205572507897 is 798705275502.

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

It is not a de Polignac number, because 205572507897 - 2¹⁰ = 205572506873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205572507817) 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, 689473 + ... + 941550.

It is an arithmetic number, because the mean of its divisors is an integer number (34262921168).

Almost surely, 2^205572507897 is an apocalyptic number.

It is an amenable number.

205572507897 is a deficient number, since it is larger than the sum of its proper divisors (68530861447).

205572507897 is a wasteful number, since it uses less digits than its factorization.

205572507897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673039.

The product of its (nonzero) digits is 12348000, while the sum is 57.

The spelling of 205572507897 in words is "two hundred five billion, five hundred seventy-two million, five hundred seven thousand, eight hundred ninety-seven".