11149865780 has 12 divisors (see below), whose sum is σ = 23414718180. Its totient is φ = 4459946304.

The previous prime is 11149865761. The next prime is 11149865791. The reversal of 11149865780 is 8756894111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2118024484 + 9031841296 = 46022^2 + 95036^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278746625 + ... + 278746664.

It is an arithmetic number, because the mean of its divisors is an integer number (1951226515).

Almost surely, 2^11149865780 is an apocalyptic number.

11149865780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11149865780 is an abundant number, since it is smaller than the sum of its proper divisors (12264852400).

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

11149865780 is a wasteful number, since it uses less digits than its factorization.

11149865780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557493298 (or 557493296 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 50.

The spelling of 11149865780 in words is "eleven billion, one hundred forty-nine million, eight hundred sixty-five thousand, seven hundred eighty".