104161278505 has 16 divisors (see below), whose sum is σ = 128225470464. Its totient is φ = 81190301760.

The previous prime is 104161278499. The next prime is 104161278509. The reversal of 104161278505 is 505872161401.

It is not a de Polignac number, because 104161278505 - 2²⁷ = 104027060777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104161278509) 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, 941406 + ... + 1046215.

It is an arithmetic number, because the mean of its divisors is an integer number (8014091904).

Almost surely, 2^104161278505 is an apocalyptic number.

It is an amenable number.

104161278505 is a deficient number, since it is larger than the sum of its proper divisors (24064191959).

104161278505 is a wasteful number, since it uses less digits than its factorization.

104161278505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987896.

The product of its (nonzero) digits is 67200, while the sum is 40.

The spelling of 104161278505 in words is "one hundred four billion, one hundred sixty-one million, two hundred seventy-eight thousand, five hundred five".