61663250843 has 2 divisors, whose sum is σ = 61663250844. Its totient is φ = 61663250842.

The previous prime is 61663250821. The next prime is 61663250897. The reversal of 61663250843 is 34805236616.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61663250843 - 2⁸ = 61663250587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61663250794 and 61663250803.

It is not a weakly prime, because it can be changed into another prime (61633250843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30831625421 + 30831625422.

It is an arithmetic number, because the mean of its divisors is an integer number (30831625422).

Almost surely, 2^61663250843 is an apocalyptic number.

61663250843 is a deficient number, since it is larger than the sum of its proper divisors (1).

61663250843 is an equidigital number, since it uses as much as digits as its factorization.

61663250843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 61663250843 in words is "sixty-one billion, six hundred sixty-three million, two hundred fifty thousand, eight hundred forty-three".