11671515715505 has 32 divisors (see below), whose sum is σ = 14567528118528. Its totient is φ = 8969912582400.

The previous prime is 11671515715487. The next prime is 11671515715597. The reversal of 11671515715505 is 50551751517611.

It is not a de Polignac number, because 11671515715505 - 2⁶ = 11671515715441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 266566715 + ... + 266610495.

It is an arithmetic number, because the mean of its divisors is an integer number (455235253704).

Almost surely, 2^{11671515715505} is an apocalyptic number.

It is an amenable number.

11671515715505 is a deficient number, since it is larger than the sum of its proper divisors (2896012403023).

11671515715505 is a wasteful number, since it uses less digits than its factorization.

11671515715505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64217.

The product of its (nonzero) digits is 918750, while the sum is 50.

The spelling of 11671515715505 in words is "eleven trillion, six hundred seventy-one billion, five hundred fifteen million, seven hundred fifteen thousand, five hundred five".