61104454409 has 2 divisors, whose sum is σ = 61104454410. Its totient is φ = 61104454408.

The previous prime is 61104454399. The next prime is 61104454471. The reversal of 61104454409 is 90445440116.

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., 34272376384 + 26832078025 = 185128^2 + 163805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61104454409 is a prime.

It is not a weakly prime, because it can be changed into another prime (61104451409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30552227204 + 30552227205.

It is an arithmetic number, because the mean of its divisors is an integer number (30552227205).

Almost surely, 2^61104454409 is an apocalyptic number.

It is an amenable number.

61104454409 is a deficient number, since it is larger than the sum of its proper divisors (1).

61104454409 is an equidigital number, since it uses as much as digits as its factorization.

61104454409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 61104454409 in words is "sixty-one billion, one hundred four million, four hundred fifty-four thousand, four hundred nine".