104123721861 has 16 divisors (see below), whose sum is σ = 154423449600. Its totient is φ = 69341076864.

The previous prime is 104123721841. The next prime is 104123721869. The reversal of 104123721861 is 168127321401.

104123721861 is a `hidden beast` number, since 104 + 1 + 2 + 372 + 186 + 1 = 666.

It is not a de Polignac number, because 104123721861 - 2²⁷ = 103989504133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104123721869) 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, 2050501 + ... + 2100666.

It is an arithmetic number, because the mean of its divisors is an integer number (9651465600).

Almost surely, 2^104123721861 is an apocalyptic number.

It is an amenable number.

104123721861 is a deficient number, since it is larger than the sum of its proper divisors (50299727739).

104123721861 is an equidigital number, since it uses as much as digits as its factorization.

104123721861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152105 (or 4152099 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 104123721861 in words is "one hundred four billion, one hundred twenty-three million, seven hundred twenty-one thousand, eight hundred sixty-one".