61663250853 has 12 divisors (see below), whose sum is σ = 89106022668. Its totient is φ = 41091811200.

The previous prime is 61663250843. The next prime is 61663250897. The reversal of 61663250853 is 35805236616.

61663250853 is a `hidden beast` number, since 6 + 1 + 6 + 632 + 5 + 0 + 8 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56995355169 + 4667895684 = 238737^2 + 68322^2 .

It is not a de Polignac number, because 61663250853 - 2⁵ = 61663250821 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 61663250799 and 61663250808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61663250843) 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 in 11 ways as a sum of consecutive naturals, for example, 1395598 + ... + 1439103.

It is an arithmetic number, because the mean of its divisors is an integer number (7425501889).

Almost surely, 2^61663250853 is an apocalyptic number.

It is an amenable number.

61663250853 is a deficient number, since it is larger than the sum of its proper divisors (27442771815).

61663250853 is a wasteful number, since it uses less digits than its factorization.

61663250853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837124 (or 2837121 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 61663250853 in words is "sixty-one billion, six hundred sixty-three million, two hundred fifty thousand, eight hundred fifty-three".