11728853861957 has 2 divisors, whose sum is σ = 11728853861958. Its totient is φ = 11728853861956.

The previous prime is 11728853861891. The next prime is 11728853861983. The reversal of 11728853861957 is 75916835882711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6755601515716 + 4973252346241 = 2599154^2 + 2230079^2 .

It is a cyclic number.

It is not a de Polignac number, because 11728853861957 - 2¹⁴ = 11728853845573 is a prime.

It is a super-2 number, since 2×11728853861957² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11728853866957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5864426930978 + 5864426930979.

It is an arithmetic number, because the mean of its divisors is an integer number (5864426930979).

Almost surely, 2^{11728853861957} is an apocalyptic number.

It is an amenable number.

11728853861957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11728853861957 is an equidigital number, since it uses as much as digits as its factorization.

11728853861957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 203212800, while the sum is 71.

The spelling of 11728853861957 in words is "eleven trillion, seven hundred twenty-eight billion, eight hundred fifty-three million, eight hundred sixty-one thousand, nine hundred fifty-seven".