61965478859 has 2 divisors, whose sum is σ = 61965478860. Its totient is φ = 61965478858.

The previous prime is 61965478837. The next prime is 61965478909. The reversal of 61965478859 is 95887456916.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61965478859 - 2²⁸ = 61697043403 is a prime.

It is not a weakly prime, because it can be changed into another prime (61965478559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30982739429 + 30982739430.

It is an arithmetic number, because the mean of its divisors is an integer number (30982739430).

Almost surely, 2^61965478859 is an apocalyptic number.

61965478859 is a deficient number, since it is larger than the sum of its proper divisors (1).

61965478859 is an equidigital number, since it uses as much as digits as its factorization.

61965478859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130636800, while the sum is 68.

The spelling of 61965478859 in words is "sixty-one billion, nine hundred sixty-five million, four hundred seventy-eight thousand, eight hundred fifty-nine".