11701728862566 has 16 divisors (see below), whose sum is σ = 23947724184384. Its totient is φ = 3809865210984.

The previous prime is 11701728862477. The next prime is 11701728862567. The reversal of 11701728862566 is 66526882710711.

It is a super-2 number, since 2×11701728862566² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11701728862567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22677768856 + ... + 22677769371.

It is an arithmetic number, because the mean of its divisors is an integer number (1496732761524).

Almost surely, 2^{11701728862566} is an apocalyptic number.

11701728862566 is an abundant number, since it is smaller than the sum of its proper divisors (12245995321818).

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

11701728862566 is a wasteful number, since it uses less digits than its factorization.

11701728862566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355538275.

The product of its (nonzero) digits is 13547520, while the sum is 60.

The spelling of 11701728862566 in words is "eleven trillion, seven hundred one billion, seven hundred twenty-eight million, eight hundred sixty-two thousand, five hundred sixty-six".