87404138135909 has 32 divisors (see below), whose sum is σ = 102131328000000. Its totient is φ = 74769287190192.

The previous prime is 87404138135903. The next prime is 87404138135911. The reversal of 87404138135909 is 90953183140478.

It is a de Polignac number, because none of the positive numbers 2^k-87404138135909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87404138135903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 350193842 + ... + 350443340.

It is an arithmetic number, because the mean of its divisors is an integer number (3191604000000).

Almost surely, 2^{87404138135909} is an apocalyptic number.

It is an amenable number.

87404138135909 is a deficient number, since it is larger than the sum of its proper divisors (14727189864091).

87404138135909 is a wasteful number, since it uses less digits than its factorization.

87404138135909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251542 (or 251528 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 87404138135909 in words is "eighty-seven trillion, four hundred four billion, one hundred thirty-eight million, one hundred thirty-five thousand, nine hundred nine".