61677283849 has 2 divisors, whose sum is σ = 61677283850. Its totient is φ = 61677283848.

The previous prime is 61677283841. The next prime is 61677283873. The reversal of 61677283849 is 94838277616.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36282630400 + 25394653449 = 190480^2 + 159357^2 .

It is a cyclic number.

It is not a de Polignac number, because 61677283849 - 2³ = 61677283841 is a prime.

It is not a weakly prime, because it can be changed into another prime (61677283841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30838641924 + 30838641925.

It is an arithmetic number, because the mean of its divisors is an integer number (30838641925).

Almost surely, 2^61677283849 is an apocalyptic number.

It is an amenable number.

61677283849 is a deficient number, since it is larger than the sum of its proper divisors (1).

61677283849 is an equidigital number, since it uses as much as digits as its factorization.

61677283849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 61.

The spelling of 61677283849 in words is "sixty-one billion, six hundred seventy-seven million, two hundred eighty-three thousand, eight hundred forty-nine".