2085369934561 has 3 divisors (see below), whose sum is σ = 2085371378643. Its totient is φ = 2085368490480.

The previous prime is 2085369934547. The next prime is 2085369934579. The reversal of 2085369934561 is 1654399635802.

The square root of 2085369934561 is 1444081.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1940117480161 + 145252454400 = 1392881^2 + 381120^2 .

It is not a de Polignac number, because 2085369934561 - 2⁹ = 2085369934049 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 2085369934561.

It is not an unprimeable number, because it can be changed into a prime (2085369034561) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 722041 + ... + 2166121.

It is an arithmetic number, because the mean of its divisors is an integer number (695123792881).

Almost surely, 2^{2085369934561} is an apocalyptic number.

2085369934561 is the 1444081-st square number.

2085369934561 is the 722041-st centered octagonal number.

It is an amenable number.

2085369934561 is a deficient number, since it is larger than the sum of its proper divisors (1444082).

2085369934561 is an frugal number, since it uses more digits than its factorization.

2085369934561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888162 (or 1444081 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 61.

The spelling of 2085369934561 in words is "two trillion, eighty-five billion, three hundred sixty-nine million, nine hundred thirty-four thousand, five hundred sixty-one".