11578497091 has 12 divisors (see below), whose sum is σ = 14054468112. Its totient is φ = 9492928368.

The previous prime is 11578497089. The next prime is 11578497113. The reversal of 11578497091 is 19079487511.

It is a happy number.

It is not a de Polignac number, because 11578497091 - 2¹ = 11578497089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11578497391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5135740 + ... + 5137993.

It is an arithmetic number, because the mean of its divisors is an integer number (1171205676).

Almost surely, 2^11578497091 is an apocalyptic number.

11578497091 is a deficient number, since it is larger than the sum of its proper divisors (2475971021).

11578497091 is a wasteful number, since it uses less digits than its factorization.

11578497091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10273770 (or 10273763 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 52.

The spelling of 11578497091 in words is "eleven billion, five hundred seventy-eight million, four hundred ninety-seven thousand, ninety-one".