104135221665 has 24 divisors (see below), whose sum is σ = 180514414080. Its totient is φ = 55534673184.

The previous prime is 104135221643. The next prime is 104135221667. The reversal of 104135221665 is 566122531401.

104135221665 is a `hidden beast` number, since 10 + 413 + 5 + 221 + 6 + 6 + 5 = 666.

It is not a de Polignac number, because 104135221665 - 2⁶ = 104135221601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (104135221667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 586966 + ... + 743504.

It is an arithmetic number, because the mean of its divisors is an integer number (7521433920).

Almost surely, 2^104135221665 is an apocalyptic number.

104135221665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

104135221665 is a deficient number, since it is larger than the sum of its proper divisors (76379192415).

104135221665 is a wasteful number, since it uses less digits than its factorization.

104135221665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171333 (or 171330 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 104135221665 in words is "one hundred four billion, one hundred thirty-five million, two hundred twenty-one thousand, six hundred sixty-five".