11601555016 has 8 divisors (see below), whose sum is σ = 21752915670. Its totient is φ = 5800777504.

The previous prime is 11601555001. The next prime is 11601555019. The reversal of 11601555016 is 61055510611.

It can be written as a sum of positive squares in only one way, i.e., 11592828900 + 8726116 = 107670^2 + 2954^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (11601555019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725097181 + ... + 725097196.

Almost surely, 2^11601555016 is an apocalyptic number.

It is an amenable number.

11601555016 is a deficient number, since it is larger than the sum of its proper divisors (10151360654).

11601555016 is a wasteful number, since it uses less digits than its factorization.

11601555016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450194383 (or 1450194379 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

The spelling of 11601555016 in words is "eleven billion, six hundred one million, five hundred fifty-five thousand, sixteen".