61635048817 has 2 divisors, whose sum is σ = 61635048818. Its totient is φ = 61635048816.

The previous prime is 61635048731. The next prime is 61635048829. The reversal of 61635048817 is 71884053616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53955856656 + 7679192161 = 232284^2 + 87631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61635048817 is a prime.

It is not a weakly prime, because it can be changed into another prime (61635048317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30817524408 + 30817524409.

It is an arithmetic number, because the mean of its divisors is an integer number (30817524409).

Almost surely, 2^61635048817 is an apocalyptic number.

It is an amenable number.

61635048817 is a deficient number, since it is larger than the sum of its proper divisors (1).

61635048817 is an equidigital number, since it uses as much as digits as its factorization.

61635048817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 61635048817 in words is "sixty-one billion, six hundred thirty-five million, forty-eight thousand, eight hundred seventeen".