11257509985 has 16 divisors (see below), whose sum is σ = 13577279616. Its totient is φ = 8960549248.

The previous prime is 11257509929. The next prime is 11257510001. The reversal of 11257509985 is 58990575211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11257509985 - 2¹⁹ = 11256985697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2986572 + ... + 2990338.

It is an arithmetic number, because the mean of its divisors is an integer number (848579976).

Almost surely, 2^11257509985 is an apocalyptic number.

It is an amenable number.

11257509985 is a deficient number, since it is larger than the sum of its proper divisors (2319769631).

11257509985 is a wasteful number, since it uses less digits than its factorization.

11257509985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632.

The product of its (nonzero) digits is 1134000, while the sum is 52.

The spelling of 11257509985 in words is "eleven billion, two hundred fifty-seven million, five hundred nine thousand, nine hundred eighty-five".