87042004547405 has 4 divisors (see below), whose sum is σ = 104450405456892. Its totient is φ = 69633603637920.

The previous prime is 87042004547389. The next prime is 87042004547417. The reversal of 87042004547405 is 50474540024078.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17680990585129 + 69361013962276 = 4204877^2 + 8328326^2 .

It is not a de Polignac number, because 87042004547405 - 2⁴ = 87042004547389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8704200454736 + ... + 8704200454745.

It is an arithmetic number, because the mean of its divisors is an integer number (26112601364223).

Almost surely, 2^{87042004547405} is an apocalyptic number.

It is an amenable number.

87042004547405 is a deficient number, since it is larger than the sum of its proper divisors (17408400909487).

87042004547405 is a wasteful number, since it uses less digits than its factorization.

87042004547405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17408400909486.

The product of its (nonzero) digits is 5017600, while the sum is 50.

The spelling of 87042004547405 in words is "eighty-seven trillion, forty-two billion, four million, five hundred forty-seven thousand, four hundred five".