104909142561 has 16 divisors (see below), whose sum is σ = 155902132800. Its totient is φ = 62360851968.

The previous prime is 104909142529. The next prime is 104909142563. The reversal of 104909142561 is 165241909401.

It is a happy number.

It is not a de Polignac number, because 104909142561 - 2⁵ = 104909142529 is a prime.

It is a super-2 number, since 2×104909142561² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (104909142563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54131716 + ... + 54133653.

It is an arithmetic number, because the mean of its divisors is an integer number (9743883300).

Almost surely, 2^104909142561 is an apocalyptic number.

It is an amenable number.

104909142561 is a deficient number, since it is larger than the sum of its proper divisors (50992990239).

104909142561 is a wasteful number, since it uses less digits than its factorization.

104909142561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108265408.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 104909142561 in words is "one hundred four billion, nine hundred nine million, one hundred forty-two thousand, five hundred sixty-one".