61085386253 has 4 divisors (see below), whose sum is σ = 61338852828. Its totient is φ = 60831919680.

The previous prime is 61085386217. The next prime is 61085386279. The reversal of 61085386253 is 35268358016.

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 50986543204 + 10098843049 = 225802^2 + 100493^2 .

It is a cyclic number.

It is not a de Polignac number, because 61085386253 - 2⁶ = 61085386189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61085386198 and 61085386207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61085380253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126732926 + ... + 126733407.

It is an arithmetic number, because the mean of its divisors is an integer number (15334713207).

Almost surely, 2^61085386253 is an apocalyptic number.

It is an amenable number.

61085386253 is a deficient number, since it is larger than the sum of its proper divisors (253466575).

61085386253 is a wasteful number, since it uses less digits than its factorization.

61085386253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253466574.

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 61085386253 in words is "sixty-one billion, eighty-five million, three hundred eighty-six thousand, two hundred fifty-three".