11612161605 has 64 divisors (see below), whose sum is σ = 20760385536. Its totient is φ = 5494944000.

The previous prime is 11612161601. The next prime is 11612161607. The reversal of 11612161605 is 50616121611.

It is not a de Polignac number, because 11612161605 - 2² = 11612161601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11612161601) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1314112 + ... + 1322918.

It is an arithmetic number, because the mean of its divisors is an integer number (324381024).

Almost surely, 2^11612161605 is an apocalyptic number.

11612161605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11612161605 is a deficient number, since it is larger than the sum of its proper divisors (9148223931).

11612161605 is a wasteful number, since it uses less digits than its factorization.

11612161605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018.

The product of its (nonzero) digits is 2160, while the sum is 30.

The spelling of 11612161605 in words is "eleven billion, six hundred twelve million, one hundred sixty-one thousand, six hundred five".