11506660615605 has 32 divisors (see below), whose sum is σ = 18675394231680. Its totient is φ = 6048752855040.

The previous prime is 11506660615603. The next prime is 11506660615627. The reversal of 11506660615605 is 50651606660511.

It is not a de Polignac number, because 11506660615605 - 2¹ = 11506660615603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11506660615603) 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, 1898211 + ... + 5159120.

It is an arithmetic number, because the mean of its divisors is an integer number (583606069740).

Almost surely, 2^{11506660615605} is an apocalyptic number.

11506660615605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11506660615605 is a deficient number, since it is larger than the sum of its proper divisors (7168733616075).

11506660615605 is a wasteful number, since it uses less digits than its factorization.

11506660615605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7058901.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 11506660615605 in words is "eleven trillion, five hundred six billion, six hundred sixty million, six hundred fifteen thousand, six hundred five".