61417648777 has 2 divisors, whose sum is σ = 61417648778. Its totient is φ = 61417648776.

The previous prime is 61417648769. The next prime is 61417648813. The reversal of 61417648777 is 77784671416.

61417648777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51916078201 + 9501570576 = 227851^2 + 97476^2 .

It is a cyclic number.

It is not a de Polignac number, because 61417648777 - 2³ = 61417648769 is a prime.

It is not a weakly prime, because it can be changed into another prime (61417648757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30708824388 + 30708824389.

It is an arithmetic number, because the mean of its divisors is an integer number (30708824389).

Almost surely, 2^61417648777 is an apocalyptic number.

It is an amenable number.

61417648777 is a deficient number, since it is larger than the sum of its proper divisors (1).

61417648777 is an equidigital number, since it uses as much as digits as its factorization.

61417648777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11063808, while the sum is 58.

The spelling of 61417648777 in words is "sixty-one billion, four hundred seventeen million, six hundred forty-eight thousand, seven hundred seventy-seven".