61685676853 has 2 divisors, whose sum is σ = 61685676854. Its totient is φ = 61685676852.

The previous prime is 61685676839. The next prime is 61685676883. The reversal of 61685676853 is 35867658616.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59954950449 + 1730726404 = 244857^2 + 41602^2 .

It is a cyclic number.

It is not a de Polignac number, because 61685676853 - 2²¹ = 61683579701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61685676791 and 61685676800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61685676883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30842838426 + 30842838427.

It is an arithmetic number, because the mean of its divisors is an integer number (30842838427).

Almost surely, 2^61685676853 is an apocalyptic number.

It is an amenable number.

61685676853 is a deficient number, since it is larger than the sum of its proper divisors (1).

61685676853 is an equidigital number, since it uses as much as digits as its factorization.

61685676853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43545600, while the sum is 61.

The spelling of 61685676853 in words is "sixty-one billion, six hundred eighty-five million, six hundred seventy-six thousand, eight hundred fifty-three".