11601616505 has 32 divisors (see below), whose sum is σ = 15016320000. Its totient is φ = 8576390592.

The previous prime is 11601616501. The next prime is 11601616517. The reversal of 11601616505 is 50561610611.

It is not a de Polignac number, because 11601616505 - 2² = 11601616501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11601616501) 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, 3866996 + ... + 3869994.

It is an arithmetic number, because the mean of its divisors is an integer number (469260000).

Almost surely, 2^11601616505 is an apocalyptic number.

It is an amenable number.

11601616505 is a deficient number, since it is larger than the sum of its proper divisors (3414703495).

11601616505 is a wasteful number, since it uses less digits than its factorization.

11601616505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013.

The product of its (nonzero) digits is 5400, while the sum is 32.

The spelling of 11601616505 in words is "eleven billion, six hundred one million, six hundred sixteen thousand, five hundred five".