205712153061 has 4 divisors (see below), whose sum is σ = 274282870752. Its totient is φ = 137141435372.

The previous prime is 205712153057. The next prime is 205712153069. The reversal of 205712153061 is 160351217502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 205712153061 - 2² = 205712153057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205712153069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34285358841 + ... + 34285358846.

It is an arithmetic number, because the mean of its divisors is an integer number (68570717688).

Almost surely, 2^205712153061 is an apocalyptic number.

It is an amenable number.

205712153061 is a deficient number, since it is larger than the sum of its proper divisors (68570717691).

205712153061 is an equidigital number, since it uses as much as digits as its factorization.

205712153061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68570717690.

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 205712153061 in words is "two hundred five billion, seven hundred twelve million, one hundred fifty-three thousand, sixty-one".