111651610648 has 32 divisors (see below), whose sum is σ = 214396761600. Its totient is φ = 54485761312.

The previous prime is 111651610571. The next prime is 111651610649. The reversal of 111651610648 is 846016156111.

It is a self number, because there is not a number n which added to its sum of digits gives 111651610648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111651610649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278590 + ... + 548557.

It is an arithmetic number, because the mean of its divisors is an integer number (6699898800).

Almost surely, 2^111651610648 is an apocalyptic number.

It is an amenable number.

111651610648 is a deficient number, since it is larger than the sum of its proper divisors (102745150952).

111651610648 is a wasteful number, since it uses less digits than its factorization.

111651610648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827559 (or 827555 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

Adding to 111651610648 its reverse (846016156111), we get a palindrome (957667766759).

The spelling of 111651610648 in words is "one hundred eleven billion, six hundred fifty-one million, six hundred ten thousand, six hundred forty-eight".