11535220666044 has 18 divisors (see below), whose sum is σ = 29158474461480. Its totient is φ = 3845073555336.

The previous prime is 11535220665971. The next prime is 11535220666121. The reversal of 11535220666044 is 44066602253511.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×11535220666044² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160211398104 + ... + 160211398175.

It is an arithmetic number, because the mean of its divisors is an integer number (1619915247860).

Almost surely, 2^{11535220666044} is an apocalyptic number.

It is an amenable number.

11535220666044 is an abundant number, since it is smaller than the sum of its proper divisors (17623253795436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11535220666044 is a wasteful number, since it uses less digits than its factorization.

11535220666044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320422796289 (or 320422796284 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 11535220666044 in words is "eleven trillion, five hundred thirty-five billion, two hundred twenty million, six hundred sixty-six thousand, forty-four".