104450765561 has 2 divisors, whose sum is σ = 104450765562. Its totient is φ = 104450765560.

The previous prime is 104450765479. The next prime is 104450765563. The reversal of 104450765561 is 165567054401.

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., 83134765561 + 21316000000 = 288331^2 + 146000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104450765561 is a prime.

Together with 104450765563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (104450765563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52225382780 + 52225382781.

It is an arithmetic number, because the mean of its divisors is an integer number (52225382781).

Almost surely, 2^104450765561 is an apocalyptic number.

It is an amenable number.

104450765561 is a deficient number, since it is larger than the sum of its proper divisors (1).

104450765561 is an equidigital number, since it uses as much as digits as its factorization.

104450765561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 104450765561 in words is "one hundred four billion, four hundred fifty million, seven hundred sixty-five thousand, five hundred sixty-one".