11705558613 has 32 divisors (see below), whose sum is σ = 19115636736. Its totient is φ = 6225139008.

The previous prime is 11705558611. The next prime is 11705558621. The reversal of 11705558613 is 31685550711.

It is a happy number.

It is not a de Polignac number, because 11705558613 - 2¹ = 11705558611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11705558611) 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, 309631 + ... + 345372.

It is an arithmetic number, because the mean of its divisors is an integer number (597363648).

Almost surely, 2^11705558613 is an apocalyptic number.

It is an amenable number.

11705558613 is a deficient number, since it is larger than the sum of its proper divisors (7410078123).

11705558613 is a wasteful number, since it uses less digits than its factorization.

11705558613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655073.

The product of its (nonzero) digits is 126000, while the sum is 42.

The spelling of 11705558613 in words is "eleven billion, seven hundred five million, five hundred fifty-eight thousand, six hundred thirteen".