11649894612 has 48 divisors (see below), whose sum is σ = 29536819200. Its totient is φ = 3560237280.

The previous prime is 11649894577. The next prime is 11649894617. The reversal of 11649894612 is 21649894611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11649894617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 817062 + ... + 831197.

It is an arithmetic number, because the mean of its divisors is an integer number (615350400).

Almost surely, 2^11649894612 is an apocalyptic number.

11649894612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11649894612 is an abundant number, since it is smaller than the sum of its proper divisors (17886924588).

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

11649894612 is a wasteful number, since it uses less digits than its factorization.

11649894612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648316 (or 1648314 counting only the distinct ones).

The product of its digits is 746496, while the sum is 51.

Subtracting 11649894612 from its reverse (21649894611), we obtain a palindrome (9999999999).

The spelling of 11649894612 in words is "eleven billion, six hundred forty-nine million, eight hundred ninety-four thousand, six hundred twelve".