11385128273 has 8 divisors (see below), whose sum is σ = 11611447848. Its totient is φ = 11159234944.

The previous prime is 11385128207. The next prime is 11385128281. The reversal of 11385128273 is 37282158311.

It can be written as a sum of positive squares in 4 ways, for example, as 9412624 + 11375715649 = 3068^2 + 106657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11385128273 - 2²⁶ = 11318019409 is a prime.

It is a super-2 number, since 2×11385128273² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11385128273.

It is not an unprimeable number, because it can be changed into a prime (11385128203) 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, 52340 + ... + 159717.

It is an arithmetic number, because the mean of its divisors is an integer number (1451430981).

Almost surely, 2^11385128273 is an apocalyptic number.

It is an amenable number.

11385128273 is a deficient number, since it is larger than the sum of its proper divisors (226319575).

11385128273 is a wasteful number, since it uses less digits than its factorization.

11385128273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213123.

The product of its digits is 80640, while the sum is 41.

The spelling of 11385128273 in words is "eleven billion, three hundred eighty-five million, one hundred twenty-eight thousand, two hundred seventy-three".